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## Main Question or Discussion Point

Can someone please tell me(and in simple terms-like in percentages), what the maximal violations of Bell's inequality has been recorded at in actual experiments and in an ideal scenario? Thank you.

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Can someone please tell me(and in simple terms-like in percentages), what the maximal violations of Bell's inequality has been recorded at in actual experiments and in an ideal scenario? Thank you.

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Nugatory

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I mean it in the sense that as many loopholes are closed as possible.

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Nugatory

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This one, from 2015: https://arxiv.org/abs/1508.05949 was discussed in several threads here when it first appeared.I mean it in the sense that as many loopholes are closed as possible.

Using the CHSH form of the inequality, 2.42 against the classical limit of 2.0

(the link is to a preprint -as far as I know the final publication is behind a paywall)

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So is 2.42 the maximum level of violation ?This one, from 2015: https://arxiv.org/abs/1508.05949 was discussed in several threads here when it first appeared.

Using the CHSH form of the inequality, 2.42 against the classical limit of 2.0

(the link is to a preprint -as far as I know the final publication is behind a paywall)

- #6

atyy

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The theoretical maximum possible in quantum theory in that situation is given by Tsirelson's bound.So is 2.42 the maximum level of violation ?

https://en.wikipedia.org/wiki/Tsirelson's_bound

The theoretical maximum possible in quantum theory in other situations has interesting issues including Tsirelson's problem, which is related to MIP* = RE, on which progress seems to have been made recently.

https://en.wikipedia.org/wiki/Tsirelson's_bound#Tsirelson's_problem

https://quantumfrontiers.com/2020/03/01/the-shape-of-mip-re/

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For CHSH how large is the violation given by Tsirelson's bound? So by what margin would it theoretically be larger than 2 according to this bound?The theoretical maximum possible in quantum theory in that situation is given by Tsirelson's bound.

https://en.wikipedia.org/wiki/Tsirelson's_bound

The theoretical maximum possible in quantum theory in other situations has interesting issues including Tsirelson's problem, which is related to MIP* = RE, on which progress seems to have been made recently.

https://en.wikipedia.org/wiki/Tsirelson's_bound#Tsirelson's_problem

https://quantumfrontiers.com/2020/03/01/the-shape-of-mip-re/

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