Quebec Mathematical Sciences Colloquium

April 12, 2013 from 16:00 to 18:00 (Montreal/EST time) On location

Quantum correlations and Tsirelson's problem

Colloquium presented by Narutaka Ozawa (RIMS, Kyoto University)

The EPR paradox tells us quantum theory is incompatible with classic realistic theory. Indeed, Bell has shown that quantum correlations of independent bipartite systems have more possibility than the classical correlations. To study what the possibilities are, Tsirelson has introduced the set of quantum correlation matrices, but depending on the interpretation of independence, there are two plausible definitions of it. Tsirelson's problem asks whether these definitions are equivalent. It turned out that this problem in quantum information theory is in fact equivalent to Connes's embedding conjecture, one of the most important open problems in theory of operator algebras. I will talk some recent progress on Tsirelson's problem.


UQAM, Pav. Sherbrooke, 200, rue Sherbrooke O., room SH-3420