Summer 2007

The seminar takes place on Mondays and Thursdays: from 4:20 pm onwards in the very relaxed atmosphere of Room G/109 in Goodricke College. The seminars are preceded by tea from 4 pm. The typical length of the talks is about 1 hour.

• Monday, 30 April 2007, 04:20 PM » 05:20 PM
  Title: Gribov copies and confinement
  Speaker: Antony Ilderton (University of Plymouth)
  Room: G/109
  Abstract: I will present an elegant and explicit construction of a wide class of Gribov copies. Although they may be generated infinitesimally, the copies are manifestly non-perturbative. As a consequence it will be demonstrated that the existence of copies provides a non-perturbative justification for the absence of physical coloured charges.
• Monday, 14 May 2007, 04:20 PM » 05:20 PM
  Title: Almost quantum theory: classical theories with a constraint on knowledge
  Speaker: Robert W. Spekkens (DAMTP, Cambridge)
  Room: G/109
  Abstract: What kind of theory would be appropriate for an agent living in a world that is essentially classical but where there is a fundamental restriction on how much knowledge can be acquired about the physical state of any system? Formalizing such a restriction, one can define several toy theories that are found to have a rich structure similar to that of quantum theory, including a notion of coherent superposition and entanglement. These theories are also found to have analogues of a wide variety of quantum phenomena, such as complementarity, interference, teleportation, no-cloning, and many quantum cryptographic and communication protocols. The diversity and quality of these analogies provides compelling evidence for the view that quantum states are not states of reality -- as most interpretations suggest -- but rather states of knowledge that are incomplete (and cannot be completed). The question "what is the nature of the reality to which this knowledge refers?" remains open in this research program but the phenomenon of contextuality (a consequence of the Bell-Kochen-Specker theorem) provides, I argue, our best clue for how to answer it.
• Thursday, 24 May 2007, 04:20 PM » 05:20 PM
  Title: A New Approach to the Quantum Measurement Problem
  Speaker: Geoffrey Sewell (Queen Mary)
  Room: G/109
  Abstract: The question I shall address is the highly contentious one of whether the traditional form of quantum mechanics, as represented by Schroedinger dynamics and the probabilistic interpretation thereof, covers the measurement process. The problem that arises here is that, whereas the Schroedinger evolution of a system is unitary, its change of state in the measurement process is highly non-unitary (cf. Von Neumann). My treatment of this problem is based on an analysis of the Schroedinger dynamics of the generic conservative model comprising an observed microsystem S and a macroscopic measuring instrument M, whose pointer positions correspond to values of a set of intercommuting macroscopic observables. My main result is that, for a suitable choice of these latter obsrvables and a suitable S-M coupling, the dynamics of the composite (S+M) induces both the change of state of S and the registartion of that change by M demanded by Von Neumann's phenomenological theory of the measurement process. Thus I conclude that the traditional picture of quantum mechanics is complete, in that that the measurement theory does indeed ensue from Schroedinger dynamics together with Born's probabilistic interpretation thereof.
• Thursday, 31 May 2007, 04:20 PM » 05:20 PM
  Title: On defects in classical integrable systems
  Speaker: Vincent Caudrelier (York)
  Room: G/109
  
  Abstract: This talk will be largely introductory. The basic idea is to propose a reformulation of the lagrangian formalism, already presented by Ed Corrigan and Peter Bowcock in previous seminars, to the question of integrable defects in field theories in 1+1 dimensions. This reformulation uses a very nice observation systematically made on a case by case basis in their work: a large class of internal (defect) boundary conditions preserving integrability is realised as Bäcklund transformations frozen at the point of the defect. I will review all these things (so everybody is welcome) and show how this can be recast in the efficient language of inverse scattering method, which will be introduced as well. Despite a possibly less appealing formalism (depending on your tastes), this approach has a number of advantages which I will present: unified proof of integrability for a large class of systems, explicit generating function of the integrals of motion, classification of defect conditions and finally, a possible way towards quantization. I will not talk about solitons, this topic having already been substantially covered by Ed and Peter.
• Thursday, 7 June 2007, 04:20 PM » 05:20 PM
  Title: Poisson structures associated with the Schrödinger equation
  Speaker: Ian Marshall
  Room: G/109
  Abstract: I shall present a new and surprisingly simple Poisson piece of the Schrödinger / KdV correspondence. It gives rise to a Poisson-Lie group of symmetries acting naturally on the space of wave functions.
• Monday, 11 June 2007, 04:20 PM » 05:20 PM
  Title: Quasi-hermitian Liouville Theory
  Speaker: Thomas Curtright (University of Miami)
  Room: G/109
  Abstract: I will briefly discuss properties of quasi-hermitian (PT-symmetric) theories in the context of a simple exactly solvable example, "imaginary" Liouville theory. I will use a deformation quantization approach, i.e. QM in phase space. Then I will discuss the field theory extension of this model, of interest in string theory.
• Monday, 18 June 2007, 04:20 PM » 05:20 PM
  Title: Expectation values for thermal states on lukewarm black holes
  Speaker: Elizabeth Winstanley (University of Sheffield)
  Room: G/109
  Abstract: It is well-known that no regular "Hartle-Hawking"-like state can exist on Schwarzschild-de Sitter black holes, where the event and cosmological horizons are of different temperatures. However, for a Reissner-Nordstrom-de Sitter black hole where the two horizons have the same temperature ("lukewarm" black holes) then we may construct a regular thermal state at this temperature. We report on calculations of the renormalized expectation values of $\phi^2$ and $T_{\mu \nu}$ for this thermal state on a lukewarm black hole background. We follow the method of Anderson, Hiscock and Samuel, which will be reviewed in detail.
  
  
• Tuesday, 26 June 2007, 04:30 PM » 05:30 PM
  Title: Enhanced black hole horizon fluctuations
  Speaker: Larry Ford (Tufts University)
  Room: G/020
• Thursday, 28 June 2007, 04:20 PM » 05:20 PM
  Title: Quantum spectral curves, quantum integrable systems and the geometric Langlands correspondence. Lecture 1
  Speaker: Alexander Chervov (Institute for Theoretical and Experimental Physics, Moscow)
  Room: G/109
  Abstract: The spectral curve is the key ingredient in the modern theory of classical integrable systems. We develop a construction of the "quantum spectral curve" and argue that it takes the analogous structural and unifying role on the quantum level also. In the simplest, but essential case the "quantum spectral curve" is given by the formula "det"$(L(z)-\partial_z)$ [Talalaev04] (hep-th/0404153). As an easy application of our constructions we obtain the following: quite a universal receipt to define quantum commuting hamiltonians from the classical ones, in particular an explicit description of a maximal commutative subalgebra in $U({\bf{gl}}_n[t])/t^N$ and in $U({\bf{gl}}_n[t^{-1}]) \otimes U(t\, {\bf{gl}}_n[t])$; its relation with the center on the of the affine algebra; an explicit formula for the center generators and a conjecture on W-algebra generators; a receipt to obtain the q-deformation of these results; the simple and explicit construction of the Langlands correspondence; the relation between the "quantum spectral curve" and the Knizhnik-Zamolodchikov equation; new generalizations of the KZ-equation; the conjecture on rationality of the solutions of the KZ-equation for special values of level. In the simplest cases we observe the coincidence of the "quantum spectral curve" and the so-called Baxter equation. Connection with the KZ-equation offers a new powerful way to construct the Baxter's Q-operator.
  Based on hep-th/0604128 (authors: A. Chervov, D. Talalaev).
• Monday, 9 July 2007, 04:20 PM » 05:20 PM
  Title: Quantum spectral curves, quantum integrable systems and the geometric Langlands correspondence. Lecture 2
  Speaker: Alexander Chervov (Institute for Theoretical and Experimental Physics, Moscow)
  Room: G/109
  Abstract: The spectral curve is the key ingredient in the modern theory of classical integrable systems. We develop a construction of the "quantum spectral curve" and argue that it takes the analogous structural and unifying role on the quantum level also. In the simplest, but essential case the "quantum spectral curve" is given by the formula "det"$(L(z)-\partial_z)$ [Talalaev04] (hep-th/0404153). As an easy application of our constructions we obtain the following: quite a universal receipt to define quantum commuting hamiltonians from the classical ones, in particular an explicit description of a maximal commutative subalgebra in $U({\bf{gl}}_n[t])/t^N$ and in $U({\bf{gl}}_n[t^{-1}]) \otimes U(t\, {\bf{gl}}_n[t])$; its relation with the center on the of the affine algebra; an explicit formula for the center generators and a conjecture on W-algebra generators; a receipt to obtain the q-deformation of these results; the simple and explicit construction of the Langlands correspondence; the relation between the "quantum spectral curve" and the Knizhnik-Zamolodchikov equation; new generalizations of the KZ-equation; the conjecture on rationality of the solutions of the KZ-equation for special values of level. In the simplest cases we observe the coincidence of the "quantum spectral curve" and the so-called Baxter equation. Connection with the KZ-equation offers a new powerful way to construct the Baxter's Q-operator.
  Based on hep-th/0604128 (authors: A. Chervov, D. Talalaev).
• Thursday, 12 July 2007, 04:20 PM » 05:20 PM
  Title: Quantum spectral curves, quantum integrable systems and the geometric Langlands correspondence. Lecture 3
  Speaker: Alexander Chervov (Institute for Theoretical and Experimental Physics, Moscow)
  Room: G/109
  Abstract: The spectral curve is the key ingredient in the modern theory of classical integrable systems. We develop a construction of the "quantum spectral curve" and argue that it takes the analogous structural and unifying role on the quantum level also. In the simplest, but essential case the "quantum spectral curve" is given by the formula "det"$(L(z)-\partial_z)$ [Talalaev04] (hep-th/0404153). As an easy application of our constructions we obtain the following: quite a universal receipt to define quantum commuting hamiltonians from the classical ones, in particular an explicit description of a maximal commutative subalgebra in $U({\bf{gl}}_n[t])/t^N$ and in $U({\bf{gl}}_n[t^{-1}]) \otimes U(t\, {\bf{gl}}_n[t])$; its relation with the center on the of the affine algebra; an explicit formula for the center generators and a conjecture on W-algebra generators; a receipt to obtain the q-deformation of these results; the simple and explicit construction of the Langlands correspondence; the relation between the "quantum spectral curve" and the Knizhnik-Zamolodchikov equation; new generalizations of the KZ-equation; the conjecture on rationality of the solutions of the KZ-equation for special values of level. In the simplest cases we observe the coincidence of the "quantum spectral curve" and the so-called Baxter equation. Connection with the KZ-equation offers a new powerful way to construct the Baxter's Q-operator.
  Based on hep-th/0604128 (authors: A. Chervov, D. Talalaev).
• Thursday, 19 July 2007, 02:00 PM » 03:00 PM
  Title: "Low Energy Quantum Gravity" workshop
  

  All lectures will take place in B/B006 (Biology). The provisional program is below. For more details, see http://winstanley.staff.shef.ac.uk/LEQG.html

  All are welcome to attend, but if you plan to attend, please send an e-mail to leqg.york@googlemail.com

  Programme:

  Low-Energy Quantum Gravity,

  University of York, 19th-20th July 2007, Biology Lecture Theatre B/B006

  Thursday 19th July

  2.00 - 3.15 pm David Toms (Newcastle)

  Quantum gravity and gauge coupling constants

  3.15 - 3.45 pm Tea and coffee

  3.45 - 4.25 pm Calvin Smith (Dublin)

  Bounds on negative energy in quantum field theory

  4.25 - 4.55 pm Jorma Louko (Nottingham)

  How often does an accelerated particle detector click?

  4.55 - 5.35 pm Jean Alexandre (KCL)

  A non-perturbative time-dependent string configuration without extra dimensions?

  Friday 20th July

  9.30 - 10.45 am Karl-Henning Rehren (Gottingen)

  AdS-CFT correspondence and CFT with boundaries

  10.45 - 11.15 am Tea and coffee

  11.15 am - 12.30 pm Remo Garattini (Bergamo)

  A multi gravity approach to space-time foam

  12.30 - 2.00 pm Lunch

  2.00 - 2.40 pm Veronika Hubeny (Durham)

  Emergence of space-time in AdS/CFT

  2.40 - 3.20 pm Atsushi Higuchi (York)

  Infra-red properties of quantum field theories in de Sitter space-time

  3.20 pm Tea and coffee

• Thursday, 26 July 2007, 04:20 PM » 05:05 PM
  Title: Clustering and caustics in turbulent aerosols
  Speaker: Michael Wilkinson (The Open University)
  Room: G/109
  Abstract:
  Small particles suspended in a turbulent gas can cluster together.  It is widely believed that this is due to particles being  ‘centrifuged’ away from vortices. It has also been proposed that this clustering effect results in an increased rate of collision of particles.
  
  I will describe recent results which quantify the clustering of particles, by means of a mapping to a perturbation of a nine-dimensional quantum harmonic oscillator. The centrifugal effect plays no role in my model, and the results are in good agreement with simulations of particles in turbulent flows.
  
  I also argue that the increased rate of collision of particles in turbulent flows is primarily caused by the generation of caustics in the velocity field of the particles, rather than  spatial clustering.
  
  These results are relevant to the initiation of rainfall from cumulus clouds, or the formation of planets from dust around  a young star.

Spring 2007

The seminar takes place on Mondays and Thursdays: from 4:20 pm onwards in the very relaxed atmosphere of Room G/109 in Goodricke College. The seminars are preceded by tea from 4 pm. The typical length of the talks is about 1 hour.

 

• Monday, 15 January 2007, 04:20 PM » 05:20 PM
  Title: Integrability and the AdS/CFT Correspondence
  Speaker: Nick Dorey (DAMTP, Cambridge)
  Room: G/109
  Abstract: I will discuss the emergence of integrability in planar $N=4$ SUSY Yang-Mills and in the dual string theory on $AdS_{5} \times  S^{5}$. I will also review recent progress in exploiting integrability to determine the exact spectrum.
• Thursday, 18 January 2007, 04:20 PM » 05:20 PM
  Title: Spinor vector duality in fermionic $\mathbb{Z}_2 \times \mathbb{Z}_2$ heterotic-string orbifolds
  Speaker: Alon Faraggi (University of Liverpool)
  Room: G/109
• Monday, 22 January 2007, 04:20 PM » 05:20 PM
  Title: Integrable systems, analytic difference equations, special functions, Hilbert space: On the crossroads
  Speaker: Simon Ruijsenaars (Loughborough)
  Room: G/109
  Abstract: In this lecture we aim to survey the 4 areas mentioned above, with a bias towards the study of special classes of analytic difference operators. The problem of understanding their Hilbert space features centers around the issue of orthogonality and completeness of suitable eigenfunction transforms, which generalize various previously known transforms (the most well-known being Fourier transformation). The analytic difference operators arise from certain integrable systems, including nonlocal soliton equations and relativistic N-particle systems of Calogero-Moser and Toda type.
• Monday, 29 January 2007, 04:20 PM » 05:20 PM
  Title: Reflection equation and twisted Yangians
  Speaker: Andrey Mudrov (York)
  Room: G/109
  Abstract: With any involutive anti-algebra and coalgebra automorphism of a quasitriangular bialgebra we associate a reflection equation algebra. A Hopf algebraic treatment of the reflection equation of this type and its universal solution is given. Applications to the twisted Yangians are considered.
• Monday, 5 February 2007, 04:20 PM » 05:20 PM
  Title: Black holes, qubits and the Fano Plane
  Speaker: Michael Duff (Imperial College)
  Room: G/109
  Abstract: We review some recently established connections between the mathematics of black hole entropy in string theory and that of multipartite entanglement in quantum information theory. In the case of $N=2$ black holes and the entanglement of three qubits, the quartic $[SL(2)]^3$ invariant, Cayley's hyperdeterminant, provides both the black hole entropy and the measure of tripartite entanglement. In the case of $N=8$ black holes and the entanglement of seven qubits, the quartic $E_{7}$ invariant of Cartan provides both the black hole entropy and the measure of a particular tripartite entanglement encoded in the Fano plane.
• Monday, 12 February 2007, 04:20 PM » 05:20 PM
  Title: Irreducibility of fusion modules over twisted Yangians at generic point
  Speaker: Andrey Mudrov (York)
  Room: G/109
  Abstract: With any skew Young diagram one can associate a one parameter family of "elementary" modules over the Yangian $Y(gl_N)$. Consider the twisted Yangian $Y(g_N)$, a subalgebra in $Y(gl_N)$, associated with a classical matrix Lie subalgebra $g_N$ in $gl_N$. Regard the tensor product of elementary Yangian modules as multiparameter family of modules over $Y(g_N)$ by restriction. We prove irreducibility of such modules for generic values of the parameters.
• Monday, 19 February 2007, 04:15 PM » 05:15 PM
  Title: Spin Foam models for quantum gravity
  Speaker: John Barrett (Nottingham)
  Room: G/109
• Thursday, 22 February 2007, 04:20 PM » 05:20 PM
  Title: The $P(\Phi)_2$ model on the de Sitter space
  Speaker: Christian Jaekel (University of Talca, Chile)
  Room: G/109
  This is joined work with J. Barata and J. Mund.
  Abstract: We provide a self-contained construction of the model, based on a great variety of  methods and results from the literature, including harmonic analysis on symmetric spaces, group representation theory, Markov processes, Tomita-Takesaki modular theory and Osterwalder-Schrader reconstruction theorems. The thermal aspects (Hawking temperature) induced by the curvature and the exceptional case of  particles with small masses are discussed in the interacting case. We also explore the relations of the euclidean approach to the Wightman and Haag-Kastler axiomatic schemes which have been proposed for de Sitter space recently.
• Monday, 5 March 2007, 04:20 PM » 05:20 PM
  Title: Vacuum Energy Density of a Quantized Scalar Field
  Speaker: Stephen A. Fulling (Texas A&M University)
  Room: G/109
  Abstract: The energy density (as distinct from total energy) involves interesting mathematics and controversial physics. Regularization by an ultraviolet cutoff leads to reformulation of the problem in terms of "cylinder kernels" (Green functions of elliptic boundary value problems with an extra dimension), which can be related to heat and resolvent kernels, zeta functions, and local densities of states, but yield vacuum energies more directly. The signs of vacuum energies are related to the phases of oscillations in the eigenvalue density indexed by periodic orbits; for densities the relevant classical paths are closed but not necessarily periodic. The energy density generally is divergent as a boundary is approached, and therefore the naively renormalized total energy is not equal to the spatial integral of the renormalized density. This raises the issue of consistency of the theory with general relativity, as well as that of physical validity of calculations of Casimir forces other than those between rigid bodies. When the integration is done before the cutoff is removed, some of these divergences (notably those at corners) disappear. For the others we argue that the traditional renormalization philosophy is applicable: In the absence of a detailed microscopic model of the boundary material (playing the same role as unknown ultrahigh-energy physics), formally infinite terms should be replaced by finite terms with the same geometrical form and unknown coefficients that must be fixed experimentally. In particular, a consistent interpretation of the Einstein equation with distributional sources is being developed in collaboration with Ricardo Estrada, Kim Milton, Klaus Kirsten, and Lev Kaplan.
• Monday, 12 March 2007, 04:20 PM » 05:20 PM
  Title: New methods in the study of non-equilibrium impurity systems: the interacting resonant level model
  Speaker: Benjamin Doyon (Oxford)
  Room: G/109
  Abstract: With the example of the interacting resonant level model (IRLM), we show how to fully exploit simple properties of Hershfield’s Y operator along with “impurity conditions” in impurity models in order to obtain perturbative expansions of quantum averages in any steady state. In non-equilibrium steady states, this offers a powerful alternative to Schwinger-Keldysh real-time perturbation theory or Lippmann-Schwinger scattering state formulation. We show how to solve the combinatorics of perturbative treatments, giving all integrals of the expansion without the use of Feynman diagrams. We also point out in this context how perturbation theory is connected to exact techniques based on Bethe ansatz. In the non-equilibrium IRLM, we obtain all integrals involved in the full perturbative expansion of the current in the Coulomb coupling U. Using renormalisation-group improvement, we obtain the current to first order in U for all values of voltage and temperature.
• Monday, 7 May 2007, 04:20 PM » 05:20 PM
  Title: TBA
  Speaker: Robert W. Spekkens (DAMTP, Cambridge)
  Room: G/109

 

Please note that this is the tentative evolving program. It is advisable to (re-load and) re-check the page shortly before each talk. There is a mailing list for the seminar announcements. For further details please contact Boris Noyvert.

Autumn 2006

The seminar takes place on Mondays and Thursdays: from 4:20 pm onwards in the very relaxed atmosphere of Room G/109 in Goodricke College. The seminars are preceded by tea from 4 pm. The typical length of the talks is about 1 hour.

• Monday, 9 October 2006, 04:20 PM » 05:20 PM
  Title: Classical and Quantum Radiation Reaction
  Speaker: Atsushi Higuchi (University of York)
  Room: G/109
  Abstract: In classical electrodynamics the self-force on a charged point particle due to its own electromagnetic radiation is described by the Lorentz-Dirac force.  We show that this force can be derived by taking the classical limit of the lowest-order perturbation theory in quantum electrodynamics. (This work was done in collaboration with Giles Martin.)
• Thursday, 19 October 2006, 04:20 PM » 05:20 PM
  Title: CFT description of black holes
  Speaker: Mukund Rangamani (Durham University)
  Room: G/109
• Monday, 30 October 2006, 04:20 PM » 05:20 PM
  Title: Integrable defects
  Speaker: Ed Corrigan (University of York)
  Room: G/109
• Monday, 6 November 2006, 04:20 PM » 05:20 PM
  Title: Form factors of XXX and XXZ mixed finite spin chains
  Speaker: Olalla Castro-Alvaredo (City University London)
  Room: G/109
  Abstract: In this talk I will present new formulae for the form factors of the generators of the su(2) algebra associated to XXX quantum spin chains. The main novelty is that these formulae hold for generic spin representations of the operators considered, as well as for generic spin representations at the remaining sites of the chain. Therefore they can be specialized to a number of physically interesting cases such as alternating chains or spin chains with impurities. These expressions have been obtained by employing the approach developed by the group of the ENS-Lyon around J.-M. Maillet.
  In addition, if I have enough time I will briefly describe how the so-called inverse scattering problem for the su(2)q spin generators characterizing the symmetry of quantum XXZ spin chains can be solved for generic spin representations.
  
  
• Thursday, 16 November 2006, 04:20 PM » 05:20 PM
  Title: Defect lines in conformal field theory
  Speaker: Ingo Runkel (King's College)
  Room: G/109
  Abstract: Just like one can define conformal boundary conditions for a two dimensional CFT, it is possible to join two CFTs along a conformally invariant "seam" or defect line. For such defects one can introduce reflection and transmission coefficients, defined via the stress tensors of the CFTs. Of particular interest are fully transmitting defects, because they contain information about symmetries and about order-disorder dualities of the CFT.
• Thursday, 23 November 2006, 04:20 PM » 05:20 PM
  Title: Exact perturbation theory for Jacobi matrices
  Speaker: Evgeny Sklyanin (University of York)
  Room: G/109
  Abstract: We report of the recent progress in developing an exact perturbative expansion for the spectrum and eigenvectors of tridiagonal (Jacobi) matrices. We present a new method of derivation of a multivariate hypergeometric representation for the series based on the multidimensional residue theory. A generalization to multiparameter spectral problem as well as possible applications to exactly solvable models (Bethe Ansatz) are discussed.
• Thursday, 30 November 2006, 04:20 PM » 05:20 PM
  Title: Dynamical defects
  Speaker: Peter Bowcock (Durham)
  Room: G/109
• Thursday, 7 December 2006, 04:20 PM » 05:20 PM
  Title: Associahedra and Integrable Models
  Speaker: Charles Young (Durham university)
  Room: G/109
  Abstract: As part of some work in progress, Nicolas Crampe and I have found ourselves looking at interesting geometrical objects known as the "permutohedra", "associahedra", and even "permutoassociahedra". I will try to explain what these are and how they are related to integrable models and quantum groups.

Spring 2006

The seminar takes place on Mondays and Thursdays: from 4:20 pm onwards in the very relaxed atmosphere of Room G/109 in Goodricke College. The seminars are preceded by tea from 4 pm. The typical length of the talks is about 1 hour.

 

Information on How to Reach the University is available. Goodricke College is building 24 on the campus map. Please contact Charles Young by e-mail if you need further information.

Please also check the Departmental Events Calendar for other seminars which might be of interest. For example the Departmental Colloquium talks on Wednesdays sometimes are on mathematical physics.

Programme

 

Mon 13 March at 16:20:
Valya Khoze (Durham)
New results in the beta-deformed conformal N=4 SYM: Perturbative Amplitudes, AdS/CFT Correspondence...

Autumn 2005

The seminar takes place on Mondays and Thursdays: from 4:20 pm onwards in the very relaxed atmosphere of Room G/109 in Goodricke College. The seminars are preceded by tea from 4 pm. The typical length of the talks is about 1 hour. Information on How to Reach the University is available. Goodricke College is building 24 on the campus map. Please contact Charles Young by e-mail if you need further information. Please also check the Departmental Events Calendar for other seminars which might be of interest. For example the Departmental Colloquium talks on Wednesdays sometimes are on mathematical physics. Programme Please note that this is the tentative evolving program. It is advisable to (re-load and) re-check the page shortly before each talk. There is a mailing list for the seminar announcements. For further details please contact Charles Young
20th October 2005 Thursday 4.20pm	David Kagan (DAMTP, Cambridge) Supersymmetric Quantum Mechanics: Central Extensions and Extra Dimensions
24th October 2005 Monday 4.20pm	Masashi Hamanaka (Nagoya University) Towards Noncommutative Integrable Systems and Soliton Theories
27th October 2005 Thursday 4.20pm	Thomas Quella (Kings College, London) Supergroup sigma-models and strings in RR backgrounds
31st October 2005 Monday 4.20pm	Mathematical Physics Group Meeting
3rd November 2005 Thursday 4.20pm	Calvin Smith (York) TBA
7th November 2005 Monday 4.20pm	Bernard Kay (York) Quantum Field Theory in Curved Spacetime
10th November 2005 Thursday 4.20pm	Terry Rudolph (Imperial) |How good must single photon sources be for optical quantum computation?› + |Loss tolerant cluster state computation›
14th November 2005 Monday 4.20pm
17th November 2005 Thursday 4.20pm	David Olive (Swansea) Minimal representations and Freudenthal Triple Systems
21st November 2005 Monday 4.20pm
24th November 2005 Thursday 4.20pm	Valentina Riva (Oxford) New perspective on critical phenomena: SLE and its connection with CFT.
28th November 2005 Monday 4.20pm	Ruth Williams (DAMTP, Cambridge) Discrete Quantum Gravity
1st December 2005 Thursday 4.20pm	Gaetano Bertoldi (Swansea) Large N double-scaling limits of 4d gauge theories
5th December 2005 Monday 4.20pm
8th December 2005 Thursday 4.20pm	Jonathan Halliwell (Imperial) Emergent Classicality via Commuting Position and Momentum Operators
12th December 2005 Monday 4.20pm
15th December 2005 Thursday 4.20pm	Lutz Osterbrink (York) Energy inequalities for the non-minimally coupled scalar field
19th December 2005 Monday 4.20pm	Yann Golanski (York) Dark energy: Who would have thought Einstein was right?

See also our Archive of Past Mathematical Physics Seminars

Summer 2005

Mathematical Physics Seminars
Summer 2005

The seminar takes place on Mondays and Thursdays: from 4:20 pm onwards in the very relaxed atmosphere of Room G/109 in Goodricke College. The seminars are preceded by tea from 4 pm. The typical length of the talks is about 1 hour.

Information on How to Reach the University is available. Goodricke College is building 24 on the campus map. Please contact Bernard Kay by e-mail if you need further information.

Programme

Please note that this is the tentative evolving program. It is advisable to (re-load and) re-check the page shortly before each talk. There is a mailing list for the seminar announcements. For further details please contact Bernard Kay

28th April 2005 Thursday 4.20pm V/123	Christian Micheletti (SISSA, Trieste) Elastic properties of proteins: characterization of the flexibility of proteins and of their functional movements Note unusual venue: VANBRUGH V/123
9th May 2005 Monday 4.20pm	I.V. Komarov (St. Petersburg) Poisson maps and Lax pairs for the so(4) Kowalevski top
16th May 2005 Monday 4.20pm	Anne C. Davis (DAMTP, Cambridge) Exploring Extra Dimensions Through Cosmology
23rd May 2005 Monday 4.20pm	Tobias Osborne (Bristol) General Monogamy Inequality for Bipartite Qubit Entanglement
30th May 2005 Monday 4.20pm	Atsushi Higuchi (York) Asymptotic Freedom (Instructional Lecture)
6th June 2005 Monday 4.20pm	Da-jun Zhang (Shanghai) Solutions in Wronskian form to soliton equations
13th June 2005 Monday 4.20pm	Paul Sutcliffe (Kent) Schrodinger-Chern-Simons vortex dynamics
28th June 2005 Tuesday (11.45am to 6pm)	Note: Five Mathematical Physics Seminars in the North British Mathematical Physics Seminar today
30th August 2005 Tuesday 4.20pm	Dmitri Lebedev (ITEP, Moscow) On a class of Representations of Quantum groups and Moduli space of Monopoles I
2nd September 2005 Friday 11.30am	Dmitri Lebedev (ITEP, Moscow) On a class of Representations of Quantum groups and Moduli space of Monopoles II

Spring 2005

Mathematical Physics Seminars
Spring 2005

The seminar takes place on Mondays and Thursdays: from 4:20 pm onwards in the very relaxed atmosphere of Room G/109 in Goodricke College. The seminars are preceded by tea from 4 pm. The typical length of the talks is about 1 hour.

Information on How to Reach the University is available. Goodricke College is building 24 on the campus map. Please contact Bernard Kay by e-mail if you need further information.

Please also check the Departmental Events Calendar for other seminars which might be of interest. For example the Departmental Colloquium talks on Wednesdays sometimes are on mathematical physics.

Programme

Please note that this is the tentative evolving program. It is advisable to (re-load and) re-check the page shortly before each talk. There is a mailing list for the seminar announcements. For further details please contact Bernard Kay

17th January 2005 Monday 4.20pm	Vincent Caudrelier (LAPTH, Annecy) Impurity in integrable systems: tools, examples and physical consequences
20th January 2005 Thursday 4.20pm	Andrei Mudrov (MPI, Bonn) Explicit equivariant quantization of semisimple conjugacy classes of simple matrix groups
27th January 2005 Thursday 4.20pm	Nicola Pinamonti (Trento, Italy) Conformal symmetry breaking on Killing horizons
31st January 2005 Monday 4.20pm	Jorma Louko (Nottingham) Spin and charges: Weapons of mass construction
10th February 2005 Thursday 4.20pm	Zoltan Nagy (Cergy-Pontoise) Construction of commuting traces and spin chains using dynamical quadratic algebras
17th February 2005 Thursday 4.20pm	Matthias Christandl (CQG, Cambridge) Uncertainty, monogamy, and implications for entanglement
21st February 2005 Monday 4.20pm	Ian Hinder (Southampton) Stability in numerical relativity
24th February 2005 Thursday 4.20pm	Nilanjana Datta (CQG, Cambridge) Perfect state transfer in quantum spin networks
28th February 2005 Monday 4.20pm	Jie Xiao (Tsinghua University, Beijing) Quiver representations, Ringel-Hall algebras and quantum groups
7th March 2005 Monday 4.20pm	Graeme Mitchison (CQG, Cambridge) The spectra of quantum states and their marginals: a group representation perspective
10th March 2005 Thursday 4.20pm	Veronique Hussin (CRM, Montreal) Degeneracies of the energy spectrum of the Jaynes-Cummings model and coherent states
14th March 2005 Monday 4.20pm	Valentina Riva (Oxford) Semiclassical methods in 2D QFT: spectra and finite-size effects

Autumn 2004

Mathematical Physics Seminars
Autumn 2004

The seminar takes place on Mondays and Thursdays: from 4:20 pm onwards in the very relaxed atmosphere of Room G/109 in Goodricke College. The seminars are preceded by tea from 4 pm. The typical length of the talks is about 1 hour.

Information on How to Reach the University is available. Goodricke College is building 24 on the campus map. Please contact Bernard Kay by e-mail if you need further information.

Please also check the Departmental Events Calendar for other seminars which might be of interest. For example the Departmental Colloquium talks on Wednesdays sometimes are on mathematical physics.

Programme

Please note that this is the tentative evolving program. It is advisable to (re-load and) re-check the page shortly before each talk. There is a mailing list for the seminar announcements. For further details please contact Bernard Kay

18th October Monday 4.20pm	Mathematical Physics Group Meeting
25th October Monday 4.20pm	Martin Speight (Leeds) Algebraic topology of the Skyrme configuration space
28th October Thursday 4.20pm	Minitalks by Atsushi Higuchi, Barry Miller and Charles Young (York)
1st November Monday 4.20pm	Minitalks by Calvin Smith, Giles Martin, and Varqa Abyaneh (York)
11th November Thursday 4.20pm	Simon Ross (Durham) Time-dependent spacetimes in AdS/CFT
15th November Monday 4.20pm	Nick Evans (Southampton) A gravitational dual description of chiral symmetry breaking
22nd November Monday 4.20pm	Roberto Casadio (Bologna) Improved WKB analysis of cosmological perturbations
25 November Thursday 4.20pm	Richard Szabo (Heriot Watt) 2D Yang-Mills theory and moduli spaces of holomorphic differentials
2nd December Thursday 4.20pm	Nicolas Crampe' (York) Closed and open spin chain in any representation
6th December Monday 4.20pm	Ron King (Southampton) Local equivalence of two-qubit states: a problem in invariant theory
13th December Monday 4.20pm	Robert Weston (Heriot Watt) Transmitting defects in solvable lattice models

Summer 2004

Mathematical Physics Seminars
Summer 2004

The seminar takes place on Mondays and Thursdays: from 4:20 pm onwards in the very relaxed atmosphere of Room G/109 in Goodricke College. The seminars are preceded by tea from 4 pm. The typical length of the talks is about 1 hour.

Information on How to Reach the University is available. Goodricke College is building 24 on the campus map. Please contact Bernard Kay by e-mail if you need further information.

Please also check the Departmental Events Calendar for other seminars which might be of interest. For example the Departmental Colloquium talks on Wednesdays sometimes are on mathematical physics.

Programme

Please note that this is the tentative evolving program. It is advisable to (re-load and) re-check the page shortly before each talk. There is a mailing list for the seminar announcements. For further details please contact Bernard Kay

19 April Monday 4.20pm	Yvette Fuentes-Guridi (Oxford) Holonomic quantum computation in the presence of decoherence
26th April Monday 4.20pm	Ed Copeland (Sussex) Trying to understand the nature of dark energy in the Universe
13th May Thursday afternoon	No Seminar But ... There are some interesting MMath presentations
17th May Monday 4.20pm	Alan George (York) Coupling the massive Klein-Gordon field to a boundary oscillator
20th May Thursday 4.20pm	Andreas Winter (Bristol) Generic aspects of quantum entanglement
24th May Monday 4.20pm	Alan George (York) Coupling the massive Klein-Gordon field to a boundary oscillator (continued)
27th May Thursday 4.20pm	Gabor Toth (Eotvos University, Budapest) On N=1 supersymmetric boundary bootstrap
17th June Thursday 4.20pm	Stefan Antusch (Southampton) Neutrino Mass Models
28 June Monday 4.20pm	Zoltan Bajnok (Eotvos University, Budapest) Semiclassical Sine-Gordon on the strip

Spring 2004

Mathematical Physics Seminars
Spring 2004

The seminar takes place on Mondays and Thursdays: from 4:20 pm onwards in the very relaxed atmosphere of Room G/109 in Goodricke College. The seminars are preceded by tea from 4 pm. The typical length of the talks is about 1 hour.

Information on How to Reach the University is available. Goodricke College is building 24 on the campus map. Please contact Bernard Kay by e-mail if you need further information.

Please also check the Departmental Events Calendar for other seminars which might be of interest. For example the Departmental Colloquium talks on Wednesdays sometimes are on mathematical physics.

Programme

Please note that this is the tentative evolving program. It is advisable to (re-load and) re-check the page shortly before each talk. There is a mailing list for the seminar announcements. For further details please contact Bernard Kay

15th January Thursday 4.20pm	Alexander Mikhailov (Leeds) Infinite dimensional automorphic Lie algebras
19th January Monday 4.20pm	David McMullan (Plymouth) Charges in gauge theories
22nd January Thursday 4.20pm	Bernard Kay (York) Quantum Field Theory in Curved Spacetime 1
26th January Monday 4.20pm	Bernard Kay (York) Quantum Field Theory in Curved Spacetime 2
29th January Thursday 4.20pm	Bernard Kay (York) Quantum Field Theory in Curved Spacetime 3
2nd February Monday 4.20pm	Anne Taormina (Durham) Symmetries of string theory
5th February Thursday 4.20pm	Atsushi Higuchi (York) Quantum Field Theory in Curved Spacetime 4
9th February Monday 4.20pm	David Pearson (Hull) Spectral analysis of Schrodinger operators in Quantum Theory
12th February Thursday 4.20pm	Atsushi Higuchi (York) Quantum Field Theory in Curved Spacetime 5
16th February Monday 4.20pm	Tim Hollowood (Swansea) Integrability and gauge theories
19th February Thursday 4.20pm	Atsushi Higuchi (York) Quantum Field Theory in Curved Spacetime 6
26th February Thursday 4.20pm	Gary Gibbons (DAMTP, Cambridge) Consistent dimensional reductions from higher dimensional gravity and super gravity theories
1st March Monday 4.20pm	Koenraad Audenaert (Bangor) There, and back again: Quantum theory and global optimisation
4th March Thursday 4.20pm	Chris Fewster (York) Quantum Field Theory in Curved Spacetime 7
8th March Monday 4.20pm	no seminar
11th March Thursday 4.15pm G/010	Adrian Ottewill (University College, Dublin) Quantum fields near rotating black holes Note different venue and slightly earlier start
15th March Monday 4.20pm	Chris Fewster (York) Quantum Field Theory in Curved Spacetime 8
18th March Thursday 4.20pm	Chris Fewster (York) Quantum Field Theory in Curved Spacetime 9

Autumn 2003

Mathematical Physics Seminars
Autumn 2003

The seminar takes place on Mondays and Thursdays: from 4:20 pm onwards in the very relaxed atmosphere of Room G/109 in Goodricke College. The seminars are preceded by tea from 4 pm. The typical length of the talks is about 1 hour.

Information on How to Reach the University is available. Goodricke College is building 24 on the campus map. Please contact Bernard Kay by e-mail if you need further information.

Please also check the Departmental Events Calendar for other seminars which might be of interest. For example the Departmental Colloquium talks on Wednesdays sometimes are on mathematical physics.

Programme

Please note that this is the tentative evolving program. It is advisable to (re-load and) re-check the page shortly before each talk. There is a mailing list for the seminar announcements. For further details please contact Bernard Kay

22nd September Monday 2.15pm	Jason Szulc (York) Inequalities for marginal probabilities, quantum and classical
13th October Monday 4.20pm	Mathematical Physics Group Meeting
16th October Thursday 4.20pm	Akihiro Ishibashi (DAMTP, Cambridge) On stability of higher dimensional static black holes
20th October Monday 4.20pm	Dan Tovey (Sheffield) Searching for Supersymmetric Dark Matter at Boulby Mine
23-25 October	ABC-KLM Meeting
23rd October Thursday 4.30pm	Erika Andersson (Strathclyde) Generalised measurements in quantum mechanics Note unusual time and place: The venue for this talk is now Derwent College room D/056 (10 minutes' walk from Mathematics Department) because the talk will take place within the ABC-KLM Meeting (see link above)
27th October Monday 4.20pm	Sean Hartnoll (DAMTP, Cambridge) Black hole instabilities, thermodynamics and duality
30th October Thursday 4.20pm	Davide Fioravanti (York) An idea of universality in theories with a mass scale
3rd November Monday 4.20pm	Werner Nahm (IAS, Dublin) Conformal Field Theory and an extended Bloch group
10th November Monday 4.20pm	Tomihiro Harada (QMW, London) Self-similar solutions, critical behaviour and convergence to attractor in gravitational collapse
13th November Thursday 4.20pm	Jiannis Pachos (Imperial College, London) Coherent evolutions in one and two dimensional optical lattices.
17th November Monday 4.20pm	Niall MacKay (York) The Mathematics and Physics of Yangians 1
20th November Thursday 4.20pm	Michael Melgaard (Uppsala) Spectral Theory of Schr"{o}dinger and Dirac Operators with External Magnetic Fields. Part II: Aharonov-Bohm magnetic fields and Lieb-Thirring inequalities. Note This is the second of two talks. The first (which is subtitled Part I: Eigenvalue Asymptotics ) will be at 11.15 am on Wednesday 19th November in G/109 in the GANT seminar series. But it will not be necessary to have gone to that talk to understand this one.
24th November Monday 4.20pm	Niall MacKay (York) The Mathematics and Physics of Yangians 2
27th November Thursday 4.20pm	Viv Kendon (Imperial College, London) Quantum versions of random walks for quantum computing
1st December Monday 4.20pm	Charles Young (DAMTP, Cambridge) Local conserved charges in supersymmetric sigma models
4th December Thursday 4.20pm	Niall MacKay (York) The Mathematics and Physics of Yangians 3
8th December Monday 4.20pm	Niall MacKay (York) The Mathematics and Physics of Yangians 4
11th December Thursday 4.20pm	Niall MacKay (York) The Mathematics and Physics of Yangians 5

Summer 2003

Mathematical Physics Seminars
Summer 2003

The seminar takes place on Mondays and Thursdays: from 4:20 pm onwards in the very relaxed atmosphere of Room G/109 in Goodricke College. The seminars are preceded by coffee from 4 pm. The typical length of the talks is about 1 hour.

Information on How to Reach the University is available. Goodricke College is building 24 on the campus map. Please contact Clare Dunning by e-mail if you need further information.

Please also check the Departmental Events Calendar for other seminars which might be of interest. For example the Departmental Colloquium talks on W ednesdays sometimes are on mathematical physics.

Programme

Please note that this is the tentative evolving program. It is advisable to re-check the page shortly before each talk. There is a mailing list for the seminar announcements. For further details please contact Clare Dunning

28 April Monday 4.20pm	José Miguel Figueroa y O'Farrill (Edinburgh) Plane wave limits in string and gauge theory
6 May Tuesday 11:30 am Unusual Time	Mark Gould (Brisbane) Classification of unitary representations of simple Lie superalgebras
22nd May Thursday 4.20pm	Evgueni Sklyanin (York) Q-operator and separation of variables for Jack polynomials
29th May Thursday 4.20pm	Betti Hartmann (Durham) Monopoles and "hairy" black holes
2nd June Monday 4.20pm	Valeria Del Prete (KCL) A theoretical model for population coding of mixed continuous and discrete stimuli: from the linear rise to the asymptotic regime.
5th June Thursday 4.20pm	Chris Fewster (York) Stability of quantum systems at three scales
9th June Monday 4.20pm	Cristina Zambon (York) Classically integrable field theories with boundary conditions
16th June Monday 4.20pm	Andy Hone (UKC) Peakons, Poisson brackets and a functional equation.
19th June Thursday 4.20pm	Hugh Jones (Imperial) PT symmetry versus Hermiticity in Quantum Mechanics and Quantum Field Theory
23rd June Monday 4.20pm	Jorma Louko (Nottingham) Higher dimensional Einstein black holes and AdS/CFT conjecture
26th June Thursday 4.20pm	Roger Behrend (Cardiff) Reflections on the Reflection Equation
7 July Monday 4.20pm	Martin Halpern (Berkeley) Twisted Open Strings from Closed Strings: The WZW Orientation Orbifolds
22nd July Tuesday 4.15pm	Christopher Fuchs (Bell Labs) What is the Difference between a Quantum Observer and a Weatherman?
25th July Friday 2.15pm	Ruediger Schack (Royal Holloway) Compatible quantum state assignments
8th September Monday 2.15pm	Rainer Verch (Max Planck Institute, Leipzig) Generally covariant quantum field theory and spin and statistics for quantum fields on manifolds
22nd September Monday 2.15pm	Jason Szulc (York) Inequalities for marginal probabilities, quantum and classical

Spring 2003

Mathematical Physics Seminars
Spring 2003

The seminar takes place on Mondays and Thursdays: from 4:20 pm onwards in the very relaxed atmosphere of Room G/109 in Goodricke College. The seminars are preceded by coffee and biscuits. The typical length of the talks is about 1 hour.

Information on How to Reach the University is available. Goodricke College is building 24 on the campus map. Please contact Gustav Delius by e-mail if you need further information.

Please also check the Departmental Events Calendar for other seminars which might be of interest. For example the Departmental Colloquium talks on Wednesdays sometimes are on mathematical physics.

Programme

Please note that this is the tentative evolving program. It is advisable to re-check the page shortly before each talk. There is a mailing list for the seminar announcements. For further details please contact Dr. B.S. Kay or Dr. G.W. Delius.

16 January Thursday 4.20pm	Sam Braunstein (Bangor) Entanglement in quantum information processing
20 January Monday 4.20pm	Ed Corrigan (York) Graduate Lectures on String Theory
30 January Thursday 4.20pm	Ian Drummond (Cambridge) Bi-metric gravity - an alternative to dark matter
6 February Thursday 4.20pm	Jonathan Halliwell (Imperial) Decoherence: Some Recent Developments
27 February Thursday 4.20pm	Fay Dowker (QMW) A spontaneous collapse model on a lattice
6 March Thursday 4.20pm	Francesco Ravanini (Bologna) Excited Boundary Flows in the Tricritical Ising Model
13 March Thursday 4.20pm	Jon Links (Brisbane) Exactly solvable model for atomic-molecular Bose-Einstein condensates
17 March Monday 4.20pm	Klaus Fredenhagen (Hamburg) Time as an observable in quantum mechanics
19 March Wednesday 4.20pm	Klaus Fredenhagen (Hamburg) Quantum field theory in curved spacetime
20 March Thursday 4.20pm	Klaus Fredenhagen (Hamburg) Quantum field theory on noncommutative spacetimes

Autumn 2002

Mathematical Physics Seminars
Autumn 2002

22 August Thursday 4.20pm	Masashi Hamanaka (Univ. of Tokyo, YITP) Non-commutative ADHM construction
14 October Monday 4.20pm	Tony Sudbery (York) No-collapse interpretations of quantum mechanics
17 October Thursday 4.20pm	Bernard Kay (York) Remarks on the Foundations of Quantum Mechanics
21 October Monday 4.20pm	Postponed due to illness Deborah Konkowski (US Naval Academy) Are classically singular spacetimes quantum-mechanically singular as well?
24 October Thursday 4.20pm	Leah Henderson (Bristol) Optimal entanglement generation from quantum operations
28 October Monday 4.20pm	Ed Corrigan (York) Graduate Lectures on String Theory
31 October Thursday 4.20pm	Atsushi Higuchi (York) Radiation reaction in scalar QED
4 November Monday 4.20pm	Ed Corrigan (York) Graduate Lectures on String Theory
7 November Thursday 4.20pm	Deborah Konkowski (US Naval Academy) Are classically singular spacetimes quantum-mechanically singular as well?
11 November Monday 4.20pm	Ed Corrigan (York) Graduate Lectures on String Theory
14 November Thursday 4.20pm	Marco Bellacosa (Bologna) Nonlinear Integral Equations for Quantum Integrable Models with Boundaries
18 November Monday 4.20pm	Ed Corrigan (York) Graduate Lectures on String Theory
21 November Thursday 4.20pm	Wojtek Zakrzewski (Durham) Some Aspects of the Modified Nonlinear Schrodinger Equation
25 November Monday 4.20pm	Ed Corrigan (York) Graduate Lectures on String Theory
28 November Thursday 4.20pm	Mitch Pfenning (York) Quantum Inequalities
2 December Monday 4.20pm	Ed Corrigan (York) Graduate Lectures on String Theory
5 December Thursday 4.20pm	Joe Hilling (York) The History Projector Operator Formalism of Consistent Histories
9 December Monday 4.20pm	Ed Corrigan (York) Graduate Lectures on String Theory
12 December Thursday 4.20pm	Emily King (York) Applications of consistent histories

Summer 2002

Mathematical Physics Seminars
Summer 2002

22 April Monday 4.20pm	Richard Woodard (University of Florida) A Non-Technical (Honest!) Description of the Problem of Quantum Gravity
2 May Thursday 4.20pm	Patrick Dorey (Durham) Exact S-matrices for the q-state Potts models
6 May Monday 4.20pm	Gustav W Delius (York) Graduate Lectures on Solitons and Boundaries: Classical Soliton Solutions
9 May Thursday 4.20pm	Theodora Ioannidou (Kent) Bogomolny Yang-Mills-Higgs Solutions in (2+1) anti-de Sitter Space
13 May Monday 4.20pm	Paul Sutcliffe (Kent) Solitons in the Heart
16 May Thursday 4.20pm	Charis Anastopoulos (Utrecht) Quantum mechanical histories and interference phases
20 May Monday 4.20pm	Bernhard Baumgartner (Vienna) Order relations for sets and inequalities for entropies
21 May Tuesday 5.20pm Note special time and venue: V/123	LMS Hardy Lecture Alexander Its The non-linear Schroedinger equation on the half-line and on the interval
27 May Monday 4.20pm	Stephen Siklos (DAMTP) Singularities and invariants in general relativity
30 May Thursday 4.20pm	Hendryk Pfeiffer (DAMTP) Spin foam models in quantum gravity
6 June Thursday 4.20pm	S.M. Chitre (Tata Institute) The seismic sun and solar neutrinos
13 June Thursday	Meeting of the North British Mathematial Physics Seminar
17 June Monday 4.20pm	Thomas Roman (Connecticut) Constraints on Spatial Distributions of Negative Energy
20 June Thursday 4.20pm	Tony Sudbery (York) Quantum Fallacies A guided discussion

Spring 2002

Mathematical Physics Seminars
Spring 2002

14 January Monday 4.20pm	Jose Figueroa-O-Farrill (Edinburgh) Lie Branes: recent results
17 January Thursday 4.20pm	Larry Ford (Tufts) Focusing Vacuum Fluctuations
21 January Monday 4.20pm	Katsushi Ito (Tokyo Institute of Technology) Scattering of noncommutative solitons
24 January Thursday 4.20pm	Kevin Graham (King's College, London) Perturbations of Conformal Field Theory by Boundary Condition Changing Operators
31 January Thursday 4.20pm	Atsushi Higuchi (York) Discussion on Topological K-Theory
4 Feburary Monday 4.20pm	Atsushi Higuchi (York) Discussion on Topological K-Theory
5 February Tuesday 4.20pm (Note unusual day)	Michael Atiyah (Edinburgh) K-theory and charges
7 Feburary Thursday 4.20pm	Yann Golanski (NNDG York) Modelling of early stages of stellar formation
11 February Monday 4.20pm	James Gray (Newcastle) Moving branes in Heterotic M-theory cosmology
14 February Thursday 4.20pm	Ian Lawrie (Leeds) Dissipation and friction in the equations of motion for scalar fields
18 February Monday 4.20pm	David Toms (Newcastle) Quantum Fields off the Brane
21 February Thursday 4.20pm	Andrei Bytsko (Steklov Institute, St.Petersburg) Hamiltonians for higher spin XXZ chains
11 March Monday 4.20pm	Robert Oeckl (Marseille) tba

Autumn 2001

Mathematical Physics Seminars
Autumn 2001

The seminar takes place on Mondays and Thursdays: from 4:20 pm onwards in the very relaxed atmosphere of Room V/131 in Vanbrugh College. The seminars are preceeded by coffee and biscuits. The typical length of the talks is about 1 hour. For further details please contact Dr. B.S. Kay or Dr. G.W. Delius.

15 October Monday 4.20pm	Jason Szulc (York) The Nobel-prize-winning experiment on Bose-Einstein condensation
18 October Thursday 4.20pm	Atsushi Higuchi (York) Low-frequency scalar absorption cross sections for stationary black holes
22 October Monday 4.20pm	Alan George (York) Quintessence
25 October Thursday 4.20pm	Ruth Gregory (Durham) Braneworld instantons
29 October Monday 4.20pm	Mitch Pfenning (York) Radiation reaction in electromagnetism and general relativity: I electromagnetism
1 November Thursday 4.20pm	Mitch Pfenning (York) Radiation reaction in electromagnetism and general relativity: II gravitation
5 November Monday 4.20pm	Chris Fewster (York) Microlocal Analysis This seminar forms part of the York Mathematics Department Series of expository seminars for staff and students
8 November Thursday 4.20pm	Ian Jack (Liverpool) Finite non-commutative theories
12 November Monday 4.20pm	Tony Sudbery and Jason Szulc (York) Report on the Turin Meeting on Quantum Information (Note that the planned talks by Jochen Weller, previously announced in this slot, have had to be cancelled.)
15 November Thursday 4.20pm	(no seminar)
19 November Monday 4.20pm	Ian McIntosh (York) A rough and ready guide to cohomology. Part 2: Cech cohomology This seminar forms part of the York Mathematics Department Series of expository seminars for staff and students
22 November Thursday 4.20pm	Gustav Delius (York) Quantum group symmetry in the boundary sine-Gordon model and soliton reflection amplitudes
26 November Monday 4.20pm	John Loftin (Columbia) Toward a compactification of the moduli space of convex RP(2) surfaces
3 December Monday 4.20pm	Atsushi Higuchi (York) The renormalization group This seminar forms part of the York Mathematics Department Series of expository seminars for staff and students
10 December Monday 4.20pm	Chong-sun Chu (Durham) Aspects of noncommutative gauge theories
13 December Thursday 4.20pm	Rafael Nepomechie (Miami) Supersymmetric integrable boundary QFT in 1+1 dimensions

Summer 2001

Mathematical Physics Seminars
Summer 2001

Clicking on the highlighted dates in the calendar brings you to the seminar details in the programme below.

April Mo Tu We Th Fr Sa So             1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

May Mo Tu We Th Fr Sa So   1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31

June Mo Tu We Th Fr Sa So         1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

Times & Location

Mondays & Thursdays:	Talks start at 4:20 pm. They are preceeded by coffee and biscuits. The seminars are open ended but there will be a short break after about 50 minutes. They take place in the very relaxed atmosphere of Room V/131 in Vanbrugh College.
Wednesdays:	These are the Departmental Seminars and are supposed to be accessible to a general mathematics audience. They take place in room V/131, Vanbrugh College, at 4.00 pm. Tea will be available at 3.30 p.m. in the Senior Common Room, Vanbrugh College.

Information on How to Reach the University is available. Vanbrugh College is building 25 on the campus map. Please contact Gustav Delius by e-mail if you need a parking permit or would like further information.

Programme

This term we will have lectures by Evgueni Sklyanin on selected topics in classical and quantum integrable models every Mondays starting on May 14.

Please note that this is the tentative evolving program. It is advisable to re-check the page shortly before each talk. For further details or to be placed on the mailing list please contact Dr. B.S. Kay or Dr. G.W. Delius.

30 April Monday 4.20pm	Dr Konstantina Savvidou (Imperial) Time in histories theory
3 May Thursday 4.20pm	Dr Pascal Baseilhac (York) Expectation values of descendent fields in integrable quantum field theories
10 May Thursday 4.20pm	Dr Anastasia Doikou (York) Principal chiral model scattering and the alternating quantum spin chain
16 May Wednesday 4.00pm	Professor Paul Glendinning (UMIST) On the unique expansion of numbers in non-integer bases: a dynamical systems approach
17 May Thursday 4.20pm	Dr Rod Crewther (Adelaide) Why I want Yang-Mills topological charge to take non-integer values
23 May Wednesday 4.00pm	Dr Alan Beardon (Cambridge) Continued Fractions: Old and New
24 May Thursday 4.20pm	Professor Rex Godby (York) Many-body perturbation theory for electrons in real materials
30 May Wednesday 4.00pm	Dr Martin Matthieu (Queen's, Belfast) Elementary Operators on Calkin Algebras
31 May Thursday 4.20pm	Dr Chris Fewster (York) Quantum Inequalities for the Dirac Field
6 June special time Wednesday 4.20pm	Ryu Sasaki (YITP, Kyoto University) Hierarchies of Spin Models related to Calogero-Moser Models (hep-th/0105197)
7 June Thursday 4.20pm	Daniel Vanzella (Sao Paulo) Decay of accelerated protons and the Fulling-Davies-Unruh effect
13 June Wednesday 4.00pm	Dr Julian Barbour The dynamics of pure shape
14 June Thursday 4.20pm	Dr Julian Barbour Relativity without Relativity
15 June special time Friday 11.30am	Dr Laszlo Feher (Szeged, Hungary) Interpretations and constructions of dynamical r-matrices
28 June Thursday 4.20pm	Professor Peter Holdsworth (ENS Lyon) Spin liquides glasses and ice: degeneracy and degeneracy lifting in frustrated magnetism
9 July special time Monday 4.20pm	Prof Larry Ford (Tufts) Where is the Negative Energy? - Constraints on Spatial Distributions of Negative Energy in Quantum Field Theory

---

Classical and quantum integrable models: selected topics

Lectures by E.K. Sklyanin

Mondays 4:20pm to 6pm, starting May 14.

Abstract:

The lecture course covers a few advanced topics from the theory of integrable systems and is intended for the post-graduate and post-doctoral audience who is already familiar with the basics (definition of integrability according to Liouville-Arnold, Lax matrix, r-matrix, quantum group, Bethe Ansatz).

The topics include: Bäcklund transformations, Q-operator, separation of variables, integrable boundary conditions. The variety of techniques is illustrated on a few examples: Toda lattice, XXX magnetic chain, Calogero-Moser model.

Detailed plan of lectures:

1. Integrability: a brief review of the basics

   Liouville-Arnold's definition of integrability. Isospectral transform method: Lax matrix. Lie-Poisson groups: r-matrix. Symplectic leaves of r-matrix Poisson bracket. XXX magnetic chain as the generic integrable model associated to the sl₂-invariant r-matrix. Degenerations of XXX model: DST model, Toda lattice, Gaudin model.

   Quantization. Correspondence rules. Quantum canonical transformations: Fock formula. Quantum groups, Yangians. XXX magnetic chain, algebraic Bethe Ansatz.

2. Bäcklund transformations

   Axioms of BT: algebraicity, locality, canonicity, commutativity (Veselov theorem), spectrality. General construction of BT for the models associated to the sl₂-invariant r-matrix. Examples: Toda lattice, XXX chain, Calogero-Moser (Ruijsenaars) model.

3. Q-operator

   History: motivations, Baxter's construction, Pasquier-Gaudin, Bazhanov-Lukianov-Zamolodchikov works. Relation of Q and BT.

   Q-operator for the XXX model --- a detailed study. Universal sl₂-invariant R-matrix. Q-operator as trace of a monodromy matrix. 3 kinds of Q-operators. Factorization of the R-matrix and the Q-operator. Fusion and wronskian identities. Kernels and symbols of Q.

4. Separation of variables

   Definitions (classical and quantum case).

   Classical SoV. General construction: poles of the eigenvectors of the Lax matrix. Normalization problem. Examples: Toda lattice, XXX model, Calogero-Moser model.

   Relation of SoV and BT (Q). SoV from BT (Kuznetsov-Sklyanin). BT from SoV (Kuznetsov-Vanhaecke).

   Quantum SoV. Examples: Toda lattice, XXX model, Macdonald polynomials.

5. Integrable boundary conditions

   General construction based on exchange algebras. Comodules over quantum groups. Examples: XXX model, Toda lattice, Nonlinear Schröodinger equation.

   Bethe Ansatz, SoV, Q-operator for the systems with boundary.

Spring 2001

Mathematical Physics Seminars
Spring 2001

Clicking on the highlighted dates in the calendar brings you to the seminar details in the programme below.

January Mo Tu We Th Fr Sa So 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31

February Mo Tu We Th Fr Sa So       1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28

March Mo Tu We Th Fr Sa So       1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28

Times & Location

Mondays & Thursdays:	Talks start at 4:20 pm. They are preceeded by coffee and biscuits. The seminars are open ended but there will be a short break after about 50 minutes. They take place in the very relaxed atmosphere of Room V/131 in Vanbrugh College (building 25 on campus map).
Wednesdays:	These are the Departmental Seminars and are supposed to be accessible to a general mathematics audience. They take place in room V/131, Vanbrugh College, at 4.00 pm. Tea will be available at 3.30 p.m. in the Senior Common Room, Vanbrugh College.

The seminar slots on Mondays and Thursdays which are not filled by a regular seminar talk will be used for the D-brane reading seminar.

Programme

Please note that this is the tentative evolving program. It is advisable to re-check the page shortly before each talk. For further details or to be placed on the mailing list please contact Dr. B.S. Kay or Dr. G.W. Delius.

11 January Thursday 4.20pm	Dr Roberto Tateo (Durham) Perturbed boundary conformal field theory and quantum mechanics
15 January Monday 4.20pm	Spyros Kouris (York) Graviton two-point function in de Sitter space-time
18 January Thursday 4.20pm	Clare Dunning (York) Ordinary differential equations and integrable quantum field theories
22 January Monday 4.20pm	Dr Keith Anguige Isotropic Cosmological Singularities
24 January Wednesday 4 pm	Dr Steven Bramwell (University College London) Universal Fluctuations in Correlated Systems
25 January Thursday 4.20pm	Professor Dmitri Vassiliev (Bath) Spectral asymptotics for partial differential operators and microlocal analysis
29 January Monday 4.20pm	Jason Szulc (York) Shor's factorisation algorithm
31 January Wednesday 4 pm	Dr Benjamin Steinberg (Porto) What is partial symmetry?
1 February Thursday 4.20pm	Dr Davide Fioravanti (Durham) DE RERUM NATURA id est THE IMPORTANCE OF BEING SYMMETRY
7 February Wednesday 4 pm	Dr Paolo Papi (Rome) An overview on ad-nilpotent ideals of Borel subalgebras
8 February Thurday 4.20pm	Dr Andrew Mathas (Sydney) Affine Hecke algebras, Ariki-Koike algebras and Fock spaces
12 February Monday 4.20pm	Dr Clifford Johnson (Durham) Gauge Theory Dynamics from D-Brane Probes
13 February Tuesday 10.15pm	Dr Evgueni Sklyanin (St. Petersburg) Note that this is not a regular seminar talk but a presentation in connection with the readership position in our group.
14 February Wednesday 4 pm	Professor J Greenlees (Sheffield) Implausible equivalences and duality
15 February Thurday 4.20pm	Dr Niall MacKay (York) Vibrations of symmetric molecules and the Buckyball
19 February Monday 4.20pm	Professor Vladimir Rittenberg (Bonn) The two-component Burgers equation and applications to stochastic processes
21 February Wednesday 4 pm	Professor A Veselov (Loughborough) Configurations of hyperplanes in integrable systems
26 February Monday 4.20pm	Dr Vadim Kuznetsov (Leeds) Bäcklund transformations go digital
28 February Wednesday 4 pm	Professor P Glendinning (UMIST) Postponed because of bad weather On the unique expansion of numbers in non-integer bases: a dynamical systems approach
7 March Wednesday 4 pm	Dr M Dritschel (Newcastle-on-Tyne) to be announced
7 March Thursday 4 pm	Professor Tony Sudbery (York) Groups, geometries and mechanics
12 March Monday 4.20pm	Dr Konstantina Savvidou cancelled due to illness
22 March Thursday 4.20pm	Professor Tohru Eguchi (Tokyo) String propagation on singular Calabi-Yau manifolds

Summer 2000

Mathematical Physics Seminars
Summer 2000

We have a seminar twice a week:

Other mathematical physics seminars take place in the Wednesday Departmental Seminar series and for convenience these too are listed in the programme below.

Wednesday, 3 May:	Departmental Seminar at 4:00 in V/131 J-Y Thibou (Paris) Introduction to the Combinatorics of Ribbon Tableaux
Thursday, 4 May:	Niall MacKay (York) The Principal Chiral Model on the Half-Line
Monday, 8 May:	John Cardy (Oxford) Conformal Field Theory and Percolation
Wednesday, 10 May:	Departmental Seminar at 4.00 in V/131 T Sapatinas (Kent) An introduction to wavelet decomposition and shrinkage
Monday, 15 May:	Francois Englert (Brussels) The Fefferman-Graham ambiguity and the holographic principle
Wednesday, 17 May:	Departmental Seminar at 4:30 in V/131 Peter Phillips (Yale) Trends and Spurious Regression
Monday, 22 May:	Sergei Lukyanov (Rutgers) Finite temperature expectation values of local fields in the sinh-Gordon model
Wednesday, 24 May:	Departmental Seminar at 4:00 in V/131 Fran Burstall (Bath) Integrable systems in Conformable Geometry
Thursday, 25 May:	Reidun Twarock (York) An aperiodic analog to the Virasoro algebra via quasicrystal techniques
Wednesday, 31 May:	Departmental Seminar at 4:00 in V/131 Stephen Bramwall (University College London) Universal Fluctuations in Correlated Systems
Wednesday, 7 June:	Departmental Seminar at 4:00 in V/131 Michael Berry (Bristol) The architecture of diffraction catastrophes
Monday, 12 June:	Peter Goddard (Cambridge) An approach to Conformal Field Theory
Wednesday, 14 June:	Departmental Seminar at 4:00 in V/131 Paul Turner (Heriot-Watt) Homotopy Quantum Field Theories
Thursday, 22 June:	Don Marolf (Syracuse) String/M-Branes for relativists
Thursday, 29 June:	Tony Sudbery (York) Why Am I Me? and other interesting questions
Monday, 3 July:	Ryu Sasaki (Yukawa Institute, Kyoto) The Quantum Calogero-Moser Model
Monday, 10 July:	AM Semikhatov (Lebedev and Durham) Integrable Representations as Collective (``Quasiparticle'') Excitations

Spring 2000

Mathematical Physics Seminars
Spring 2000

We have two series of weekly Mathematical Physics seminars:     

• Monday seminars (often, but not always, internal)      
• Thursday seminars (often, but not always, external)  

Monday Seminars

Monday seminars take place at 4.15 in room G/010

17 January:	Chris Fewster  Quantum Inequalities from Microlocal Analysis
24 January:	Liu Zhao  2-Parameter Deformations of Affine Lie Algebras
31 January:	Pascal Baseilhac  From Reflection Amplitudes to Vacuum Expectation Values in Integrable Quantum Field Theories I
7 February:	Spyros Kouris  Large Distance Behaviour of the Linearized Gravity Two-Point Function in De Sitter Spacetime
14 February:	Ian McIntosh  Toda Systems and their Poisson Structures: the Co-adjoint Orbit Method I
21 February:	Ian McIntosh  Toda Systems and their Poisson Structures: the Co-adjoint Orbit Method II
28 February:	Ian McIntosh  Toda Systems and their Poisson Structures: the Co-adjoint Orbit Method III
6 March:	Katrin Wendland (Bonn)  (Crystallographic) Orbifold Conformal Field Theories
13 March:	Everyone  Informal Discussion on Quantum Gravity
20 March:	Hilary Carteret (York)  {|Local Symmetry properties of three-particle pure states> + |Local Symmetry properties of multi-particle pure states>}/sqrt(2)

---

Thursday Seminars

Thursday seminars take place at 4.15 in room V/131 (preceded by coffee at 4.00 in V/135). 

20 January:	Jorma Louko (Nottingham)   Einstein-Kepler Problem in 2+1 Dimensions
27 January:	Pascal Baseilhac (York)   Reflection Amplitudes of Non-Simply Laced Toda Theories and Thermodynamic Bethe Ansatz
3 February:	Anastasia Doikou (Durham)   Solving the Bethe-Ansatz Equations
10 February:	Everyone  Informal Discussion on Supersymmetric Quantum Mechanics
17 February:	Nicolai Kitanine (York)   Correlation Functions in the XXZ Model
24 February:	Everyone  Informal Discussion on Boundary Conformal Field Theory and String Theory
2 March:	Malcolm Ludvigsen (York)  Timelike Infinity and the Final State of Black Holes
9 March:	Tony Sudbery (York)  Entanglement
16 March:	Chris Barton (York)  Magic Squares of Lie algebras

Autumn 2000

Mathematical Physics Seminars
Autumn 2000

Clicking on the highlighted dates in the calendar brings you to the seminar details in the programme below.

October Mo Tu We Th Fr Sa So             1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31

November Mo Tu We Th Fr Sa So     1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

December Mo Tu We Th Fr Sa So         1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31

Times & Location

Mondays & Thursdays:	Talks start at 4:20 pm. They are preceeded by coffee and biscuits. The seminars are open ended but there will be a short break after about 50 minutes. They take place in the very relaxed atmosphere of Room V/131 in Vanbrugh College (building 25 on campus map).
Wednesdays:	These are the Departmental Seminars and are supposed to be accessible to a general mathematics audience. They take place in room V/131, Vanbrugh College, at 4.00 pm. Tea will be available at 3.30 p.m. in the Senior Common Room, Vanbrugh College.

The seminar slots on Mondays and Thursdays which are not filled by a regular seminar talk will be used for the D-brane reading seminar.

Programme

Please note that this is the tentative evolving program. It is advisable to re-check the page shortly before each talk. For further details or to be placed on the mailing list please contact Dr. B.S. Kay or Dr. G.W. Delius.

12 October Thursday 4.20pm	Phil Isaac (Brisbane) Quantum Lie Algebras This will be a generally accessible talk about quantum groups and quantum Lie algebras
16 October Monday 4.20pm	Prof. John Roberts (Rome) Theory of Superselection Sectors
30 October Monday 4.20pm	Brett Gibson (York) Boundary Breathers in the sine-Gordon model on the half line
2 November Thursday 4.20pm	Dr Dirk Kreimer (Mainz) From the combinatorics of Feynman diagrams to running physical parameters
8 November Wednesday 4pm	Cancelled because of flooding: Dr M Dritschel (Newcastle-upon-Tyne)
9 November Thursday 5:15pm room: V/045	Dr Chris Fewster (York) Open Lecture: A crash course in quantum mechanics This is part of a lecture series for non-scientists starting immediately after our usual seminar slot.
15 November Wednesday 4pm	Dr Stephen Bramwall (University College London) Postponed because of flooding
16 November Thursday 4:20pm	Dr Ruediger Schack (Royal Holloway) Postponed because of flooding
20 November Monday 4:20pm	Dr Lucien Hardy (C.Q.C. Oxford) Can quantum theory be obtained from reasonable axioms?
22 November Wednesday 4pm	Professor P C Chatwin (Sheffield) Aspects of the only unsolved problem of classical physics
23 November Thursday 5:15pm room: V/045	Dr Chris Fewster (York) Open Lecture: Neither here nor there but both: the central mystery of quantum mechanics This is part of a lecture series for non-scientists starting immediately after our usual seminar slot.
29 November Wednesday	Yorkshire Differential Geometry Day
30 November Thursday 5:15pm V/045	Professor Tony Sudbery (York) Open Lecture: Putting weirdness to work: quantum information and quantum computing This is part of a lecture series for non-scientists starting immediately after our usual seminar slot.
4 December Monday 4:20pm	Dr Michael Roesgen (Bonn) Applications of (essential) paths in conformal field theory
6 December Wednesday 4pm	Dr James Vickers (Southampton) How to multiply distributions
7 December Thursday 4:20pm	Dr Ruediger Schack (Royal Holloway) Generalized measurements and quantum Bayes rule
11 December Monday 4:20pm	Dr David Rideout (Syracuse) A Stochastic Growth Dynamics for Causal Sets

Autumn 1999

Mathematical Physics Seminars
Autumn 1999

We have two series of weekly Mathematical Physics seminars: 

• Monday seminars are mostly instructional. 
• Thursday seminars are for research talks, 

For further details or to be placed on the mailing list please contact Dr. B.S. Kay or Dr. G.W. Delius. 

---

Monday Seminars

25 October:	5-minute minitalks by F. Cornish, T. Brzezinski, E. Corrigan, G. Delius, C. Fewster, A. Higuchi, B. Kay, I. McIntosh, M. Nazarov, A. Sudbery.
1 November:	Gustav Delius  Conformal Field Theory I
8 November:	Tomasz Brzezinski  Algebraic Bethe Ansatz I
15 November:	Gustav Delius  Conformal Field Theory II
22 November:	Tomasz Brzezinski  Algebraic Bethe Ansatz II
29 November:	Gustav Delius  Conformal Field Theory III
6 December:	Ed Corrigan   The ADHM Construction I
13 December:	Ed Corrigan   The ADHM Construction II

---

Thursday Seminars

21 October:	Elizabeth Winstanley (Oxford)  Black holes, infinite hair and anti-de Sitter space
3 November:	free discussions
11 November:	Maxim Nazarov (York) Reflection equation and classical Lie algebras
18 November:	Christopher Fewster (York)  A general quantum inequality
25 November:	Tomasz Brzezinski (York) Algebraic Bethe Ansatz III: Solving the Bethe equations
2 December:	Vadim Kuznetsov (Leeds)  Bäcklund transformations for classical and quantum integrable systems
9 December:	Nicholas Dorey (Swansea) title tba