• V K Thankappan

      Articles written in Pramana – Journal of Physics

    • Faster-than-light particles: An alternative view

      V K Thankappan

      More Details Abstract Fulltext PDF

      The existence of a wave motion analogous to the electromagnetic waves, but with wave velocity less than that of light, is postulated. It is suggested that these waves, which transport energy and momentum with subluminal velocities, could replace the concept of faster-than-light particles. The possibility of the neutrinos as being the source of the waves is suggested for further investigation.

    • Ensemble interpretation of the EPR-Bell correlations

      Ravi K Menon V K Thankappan

      More Details Abstract Fulltext PDF

      The EPR-Bell correlations between the spins of a pair of particles originally in a singlet state are discussed both on the basis of the mathematical formalism of quantum mechanics and the ensemble interpretation. It is shown that the correlations predicted by the mathematical formalism are in agreement with those expected on the basis of the ensemble interpretation, if the electrons are treated as distinguishable particles after they separate and undergo observation. In this case, the correlations are only in partial agreement with agedanken experiment of Mermin on the subject. It is pointed out, however, that agreement with Mermin’s conclusions is possible if one treats the electrons as indistinguishable even when they are subjected to observation after separation, though there is no obvious theoretical justification for doing so.

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