Bound on Hardy's non-locality from the principle of Information Causality

Details Bound on Hardy's non-locality from the principle of Information Causality Bound on Hardy's non-locality from the principle of Information Causality

2009-12-11

arxiv.org/abs/0912.2232v2

Physical Review A 81, 032103 (2010)

Physics

Quantum Physics

Abstract modified, changes made in the conclusion, throughout the paper we clarified that the condition used by us is protocal

Scientific paper

Recently,the principle of nonviolation of information causality [Nature 461,1101 (2009)], has been proposed as one of the foundational properties of nature. We explore the Hardy's nonlocality theorem for two qubit systems, in the context of generalised probability theory, restricted by the principle of nonviolation of information causality. Applying, a sufficient condition for information causality violation, we derive an upper bound on the maximum success probability of Hardy's nonlocality argument. We find that the bound achieved here is higher than that allowed by quantum mechanics,but still much less than what the nosignaling condition permits. We also study the Cabello type nonlocality argument (a generalization of Hardy's argument) in this context.

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