O Programa de Pós-Graduação em Física da UFPE promove colóquio nesta sexta-feira (25), no auditório do Departamento de Física, às 16h. A palestra será ministrada pelo professor Cristhiano Duarte Silva, pesquisador na escola de Física e Astronomia - Universidade de Leeds e do Instituto Internacional de Física. Com o título: “Fenômenos de Concentração na Geometria das Correlações de Bell”, a palestra visa discutir as desigualdades na teoria de Bell, exibindo a não classicalidade máxima permitida na teoria quântica. Esse teorema representa um importante avanço nas distinções a respeito da mecânica quântica e a mecânica clássica.

Resumo em inglês

We are told that maximally entangled states violate maximally a paradigmatic class of Bell inequalities—displaying the maximal non-classicality allowed in quantum theory. Likewise, we also learn that for multipartite quantum systems, virtually all quantum states are maximally entangled. Combining the two facts, our intuition would guide us to say that in the many-parts regime, the likelihood of finding a multipartite state violating a Bell inequality maximally is exceptionally high. Nonetheless, we have shown that the situation is far more complicated and counterintuitive than our intuition leads us to believe. This presentation summarises two different approaches to the problem: one in which we start from the so-called correlation polytopes and investigate their geometry; and a second where the starting point is the state space. In either case, it is clear, we argue, that we get baffled by the results—and their possible physical implications—because high-dimensional statistics and geometry are counterintuitive in themselves. This presentation is organised so that non-specialists and specialists alike will leave the room having learned something new.

Mais informações
posgrad.df@ufpe.br