• Unsharp spin observables, non-locality and Fry, Walther and Li experiment

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      https://www.ias.ac.in/article/fulltext/pram/056/02-03/0189-0197

    • Keywords

       

      Unsharp observables; non-locality; detection loophole

    • Abstract

       

      Recently it has been demonstrated that Bell inequalities for spin 1/2 particles must be modified if unsharp spin observables are considered, and furthermore, the modified Bell inequalities may not be violated by quantum mechanics if the observables are sufficiently unsharp. In case of massive particles there may be more imperfection than seems to appear in the photon EPR experiments. So the experiment proposed by Fry, Walther and Li can place experimental limits on the unsharpness of spin variables. It sheds new light on the much debated issues like non-local correlations in quantum mechanics.

    • Author Affiliations

       

      Sisir Roy1

      1. Indian Statistical Institute, 203, B.T. Road, Calcutta - 700 035, India
    • Dates

       
  • Pramana – Journal of Physics | News

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