, Volume 11, Issue 9, pp 43–54 | Cite as

Special relativity, causality and quantum mechanics — 2

  • Guruprasad Kar
  • Samir Kunkri
  • Sujit K. Choudhary
General Article


We discuss the aspects of non-locality and nonseparability of states of composite quantum systems. The probabilistic nature of quantum mechanical predictions, and the impossibility of cloning, are shown to safeguard causality in the quantum world. An example of a game which can be won exploiting quantum entanglement, but which can never be won classically, is described.


Causality quantum entanglement cloning local realism completely positive maps 


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Copyright information

© Indian Academy of Sciences 2006

Authors and Affiliations

  • Guruprasad Kar
    • 1
  • Samir Kunkri
    • 1
  • Sujit K. Choudhary
    • 1
  1. 1.Physics and Applied Mathematics UnitIndian Statistical InstituteKolkataIndia

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