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SUMMARY:Quantum contextuality: inequalities and tests - Prof Andreas Winte
 r\, University of Bristol
DTSTART:20110209T200000Z
DTEND:20110209T210000Z
UID:TALK29405@talks.cam.ac.uk
CONTACT:Peter Humphreys
DESCRIPTION:The Bell-Kochen-Specker theorem proves the impossibility of a 
 classical hidden variable theory that would explain the quantum mechanical
  predictions on a single system\, at least if the classical theory is "non
 -contextual". In the talk I will review the basic argument\, and discuss r
 ecent ideas to test quantum contextuality in experiments\, via so-called n
 on-contextual inequalities. These inequalities\, starting with the work of
  Klyachko et al.\, exhibit a rich combinatorial structure relating to topi
 cs in graph theory. I will also discuss which hidden variable theories are
  ruled out by actual experiments\, in the light of the recent "finite prec
 ision" debate initiated by Meyer\, Kent and Clifton.\n\n[Based on joint wo
 rk with Adan Cabello and Simone Severini\, arXiv:1010.2163]\n\nThere will 
 be a wine reception after the talk with the guest speaker.\n\nFree for mem
 bers\, £2 for non-members
LOCATION:Pfizer Lecture Theatre\,  Department of Chemistry\, Lensfield Roa
 d
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