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Two-way protocol with imperfect devices

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Published copy (DOI)


  • Marco Lucamarini
  • Alessandro Ceré
  • Giovanni Di Giuseppe
  • Stefano Mancini
  • David Vitali
  • Paolo Tombesi


Publication details

JournalOpen Systems and Information Dynamics
DatePublished - Jun 2007
Issue number2
Number of pages10
Pages (from-to)169-178
Original languageEnglish


The security of a deterministic quantum scheme for communication, namely the LM05 [1], is studied in presence of a lossy channel under the assumption of imperfect generation and detection of single photons. It is shown that the scheme allows for a rate of distillable secure bits higher than that pertaining to BB84 [2]. We report on a first implementation of LM05 with weak pulses.

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