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Do we have any proof of entanglement other than bells inequalities? 
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#1
Jun2211, 12:45 PM

P: 915

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 variables even Bell's inequalities are not totally conclusive is there any other experiment/observation/theoreticalmathematical deduction that would show/prove, or even hint, the existence of QE? 


#2
Jun2211, 12:52 PM

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PF Gold
P: 29,238

Sure! Entangled photons can beat the diffraction limit!
http://physicsworld.com/cws/article/news/19514 Zz. 


#3
Jun2211, 12:58 PM

P: 915

is there a way to reduce the wavelength of a photon other than by entanglement? 


#4
Jun2211, 01:20 PM

Sci Advisor
PF Gold
P: 5,322

Do we have any proof of entanglement other than bells inequalities?
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/BellMultiPhotonGHZ.pdf BellKochenSpecker (don't be fooled by the name, this is different than Bell's Theorem) http://arxiv.org/PS_cache/quantph/p.../9706009v1.pdf Leggett Hardy's Paradox 


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