Do we have any proof of entanglement other than bells inequalities?

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SUMMARY

The discussion centers on the existence of proof for quantum entanglement beyond Bell's inequalities. It establishes that while Bell's inequalities demonstrate that local hidden variable theories cannot fully explain quantum mechanics, they are not entirely conclusive. Additional evidence for quantum entanglement includes the ability of entangled photons to surpass the diffraction limit. The conversation also highlights other relevant theories such as the GHZ Theorem and the Bell-Kochen-Specker theorem, which provide further insights into the nature of quantum entanglement.

PREREQUISITES
  • Understanding of Bell's inequalities and their implications in quantum mechanics
  • Familiarity with quantum entanglement and its significance
  • Knowledge of the GHZ Theorem and its proof
  • Awareness of the Bell-Kochen-Specker theorem and its relevance
NEXT STEPS
  • Research the GHZ Theorem and its experimental validations
  • Explore the Bell-Kochen-Specker theorem and its implications for quantum mechanics
  • Investigate Hardy's Paradox and its role in understanding quantum entanglement
  • Study the phenomenon of entangled photons and their applications in quantum optics
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Physicists, quantum mechanics researchers, and students interested in the foundational aspects of quantum theory and the experimental evidence supporting quantum entanglement.

San K
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do we have any proof of entanglement other than Bells Inequalities?bell's inequalities says that:

- no physical theory of local hidden variables can reproduce all of the predictions of quantum mechanics

or in other words

- the correlations in/during Quantum Entanglement (QE) are stronger than could be explained by local hidden variableseven Bell's inequalities are not totally conclusive

is there any other experiment/observation/theoretical-mathematical deduction that would show/prove, or even hint, the existence of QE?
 
Physics news on Phys.org
Sure! Entangled photons can beat the diffraction limit!

http://physicsworld.com/cws/article/news/19514

Zz.
 
ZapperZ said:
Sure! Entangled photons can beat the diffraction limit!

http://physicsworld.com/cws/article/news/19514

Zz.

ok...cool link.

is there a way to reduce the wavelength of a photon other than by entanglement?
 
San K said:
bell's inequalities says that:

- no physical theory of local hidden variables can reproduce all of the predictions of quantum mechanics

...

Well said!

Entanglement is used as a tool to demonstrate the above statement as being true. There are other techniques, separate from the usual Bell tests, as well. I might recommend you check out these subjects which are closely related (Wiki has articles on these too):

GHZ Theorem (a very complex proof but very convincing)
http://www.drchinese.com/David/Bell-MultiPhotonGHZ.pdf

Bell-Kochen-Specker (don't be fooled by the name, this is different than Bell's Theorem)
http://arxiv.org/PS_cache/quant-ph/pdf/9706/9706009v1.pdf

Leggett

Hardy's Paradox
 

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