Phase-noise limitations in continuous-variable quantum key distribution with homodyne detection

  title={Phase-noise limitations in continuous-variable quantum key distribution with homodyne detection},
  author={Roberto Corvaja},
  journal={Physical Review A},
  • R. Corvaja
  • Published 9 February 2017
  • Physics
  • Physical Review A
In continuous-variables quantum key distribution with coherent states, the advantage of performing the detection by using standard telecoms components is counterbalanced by the lack of a stable phase reference in homodyne detection due to the complexity of optical phase-locking circuits and to the unavoidable phase noise of lasers, which introduces a degradation on the achievable secure key rate. Pilot-assisted phase-noise estimation and postdetection compensation techniques are used to… 

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