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Double entanglement and quantum cryptography

  • M. Genovese
  • C. Novero

Abstract:

We propose a quantum transmission based on bi-photons, which are doubly-entangled both in polarisation and phase. This scheme finds a natural application in quantum cryptography, where we show that an eventual eavesdropper is bound to introduce a larger error on the quantum communication than for a single entangled bi-photon communication, when he steels the same information.

PACS. 03.67.Dd Quantum cryptography – 03.67.Hk Quantum communication – 42.79.-e Optical elements, devices, and systems 

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Copyright information

© EDP Sciences, Springer-Verlag, Società Italiana di Fisica 2002

Authors and Affiliations

  • M. Genovese
    • 1
  • C. Novero
    • 1
  1. 1.Istituto Elettrotecnico Nazionale Galileo Ferraris, Str. delle Cacce 91, 10135 Torino, ItalyIT

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