<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Higuchi, Atsushi</style></author><author><style face="normal" font="default" size="100%">A Sudbery</style></author><author><style face="normal" font="default" size="100%">Szulc, Jason</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">One qubit reduced states of a pure many-qubit state: polygon inequalities</style></title><secondary-title><style face="normal" font="default" size="100%">Phys Rev Lett</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Mathematical Physics</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2003</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://link.aps.org/abstract/PRL/v90/e107902</style></url></web-urls></urls><publisher><style face="normal" font="default" size="100%">American Physical Soc</style></publisher><volume><style face="normal" font="default" size="100%">90</style></volume><pages><style face="normal" font="default" size="100%">107902/1-3</style></pages><isbn><style face="normal" font="default" size="100%">0031-9007</style></isbn><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">We show that a necessary and sufficient condition for a set of n one-qubit mixed states to be the reduced states of a pure n-qubit state is that their smaller eigenvalues should satisfy polygon inequalities: each of them must be no greater than the sum of the others.

</style></abstract><custom1><style face="normal" font="default" size="100%">arXiv:quant-ph/0209085</style></custom1></record></records></xml>