Two-Way Protocol with Imperfect Devices
Marco Lucamarini, Alessandro Ceré, Giovanni Di Giuseppe, Stefano Mancini, David Vitali, Paolo Tombesi · Open Systems & Information Dynamics · 2007
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.