Bell's Inequality : Its Significance in Physics and Recent Ramifications(Quantum Entanglement)

Tsutsui Izumi

doi:10.11316/butsuri.69.12_836

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Other Title

ベル不等式 : その物理的意義と近年の展開(<小特集>量子もつれ)
ベル不等式 : その物理的意義と近年の展開
ベルフトウシキ : ソノブツリテキイギトキンネンノテンカイ

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Description

The significance of Bell's Inequality and Bell's Theorem in physics is reviewed, along with its historical background and recent ramifications. Bell's Inequality allows us to examine if Einstein's viewpoint, presented in the EPR paper and modeled into a local realistic hidden variable theory by Bell, is tenable against experimental verifications. Some of the prominent experiments are mentioned featuring possible loopholes and expansion in the scope of the tests. The observed violation of Bell's Inequality suggests that the physical reality, if granted, must be contextual and vulnerable to the influence of other parties even if they are remotely located.

Journal

Butsuri

Butsuri 69 (12), 836-844, 2014-12-05

The Physical Society of Japan