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QCIS Seminar: Contextuality and state space geometry: a sheaf-theoretic approach - Dr Raymond Lal, Oxford Univ, UK

Presenter: Dr Raymond Lal, Oxford University, UK (invited by Prof Mingsheng Ying)

Abstract: No-go theorems, such as Bell's theorem, are crucial to understanding the counter-intuitive features of quantum theory. Recently, a variety of abstract perspectives to analyse the no-go theorems have emerged. Abramsky and Brandenburger initiated one such approach, based on sheaf theory. This theory provides an elegant approach to unifying existing no-go theorems, and it suggests a new method to classify no-go theorems. How this approach relates the geometry of the state space of a physical theory to `strong' proofs of nonlocality will be described..

Brief bio: Following his Master's in theoretical physics at Imperial College London, Dr Raymond Lal has recently completed his PhD with Bob Coecke on categorical quantum mechanics at the University of Oxford. His thesis was about the compatibility between relativity and quantum theory from the perspective of quantum information. In particular, he developed a formalism using category theory to describe quantum systems in a relativistic space-time. Dr Lal's current project with Samson Abramsky relates to sheaf-theoretic methods in quantum information and quantum foundations. The general aim of this program will be to shed light on the structure of quantum theory, eg. no-go theorems and entanglement-classification, using the methods of theoretical computation.

4 September 2013
14:00 - 15:30
City - Broadway CB10 Level 3, Room 330
All Welcome
Barbara Munday

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