Noisy quantum phase communication channels

Berihu Teklu, Jacopo Trapani, Stefano Olivares, Matteo G.A. Paris

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

We address quantum phase channels, i.e communication schemes where information is encoded in the phase-shift imposed to a given signal, and analyze their performances in the presence of phase diffusion. We evaluate mutual information for coherent and phase-coherent signals, and for both ideal and realistic phase receivers. We show that coherent signals offer better performances than phase-coherent ones, and that realistic phase channels are effective ones in the relevant regime of low energy and large alphabets.

Original languageBritish English
Article number074027
JournalPhysica Scripta T
Volume90
Issue number7
DOIs
StatePublished - 1 Jul 2015

Keywords

  • Optical communication
  • Quantum communications
  • Quantum phase

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