Nonlocal setting and outcome information for violation of Bell's inequality

Details Nonlocal setting and outcome information for violation of Bell's inequality Nonlocal setting and outcome information for violation of Bell's inequality

2009-03-29

arxiv.org/abs/0903.5042v3

New J. Phys. 12, 083051 (2010)

Physics

Quantum Physics

5 pages, published version

Scientific paper

Bell's theorem is a no-go theorem stating that quantum mechanics cannot be reproduced by a physical theory based on realism, freedom to choose experimental settings and two locality conditions: setting (SI) and outcome (OI) independence. We provide a novel analysis of what it takes to violate Bell's inequality within the framework in which both realism and freedom of choice are assumed, by showing that it is impossible to model a violation without having information in one laboratory about both the setting and the outcome at the distant one. While it is possible that outcome information can be revealed from shared hidden variables, the assumed experimenter's freedom to choose the settings forces that setting information must be non-locally transferred, even when the SI condition is obeyed. The sufficient amount of transmitted information about the setting to violate the CHSH inequality up to its quantum mechanical maximum is 0.736 bits.

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