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

  1. 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/theoretical-mathematical deduction that would show/prove, or even hint, the existence of QE?
     
  2. jcsd
  3. ZapperZ

    ZapperZ 30,306
    Staff Emeritus
    Science Advisor
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  4. ok....cool link.

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

    DrChinese 5,686
    Science Advisor
    Gold Member

    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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