Fundamental Limits of Thermal-noise Lossy Bosonic Multiple Access Channel

Evan J.D. Anderson, Boulat A. Bash

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Bosonic channels describe quantum-mechanically many practical communication links such as optical, microwave, and radiofrequency. We investigate the maximum rates for the bosonic multiple access channel (MAC) in the presence of thermal noise added by the environment and when the transmitters utilize Gaussian state inputs. We develop an outer bound for the capacity region for the thermal-noise lossy bosonic MAC. We additionally find that the use of coherent states at the transmitters is capacity-Achieving in the limits of high and low mean input photon numbers. Furthermore, we verify that coherent states are capacity-Achieving for the sum rate of the channel. In the non-Asymptotic regime, when a global mean photon-number constraint is imposed on the transmitters, coherent states are the optimal Gaussian state. Surprisingly however, the use of single-mode squeezed states can increase the capacity over that afforded by coherent state encoding when each transmitter is photon number constrained individually.

Original languageEnglish (US)
Title of host publication2022 IEEE GLOBECOM Workshops, GC Wkshps 2022 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781665459754
DOIs
StatePublished - 2022
Externally publishedYes
Event2022 IEEE GLOBECOM Workshops, GC Wkshps 2022 - Virtual, Online, Brazil
Duration: Dec 4 2022Dec 8 2022

Publication series

Name2022 IEEE GLOBECOM Workshops, GC Wkshps 2022 - Proceedings
Volume2022-January

Conference

Conference2022 IEEE GLOBECOM Workshops, GC Wkshps 2022
Country/TerritoryBrazil
CityVirtual, Online
Period12/4/2212/8/22

ASJC Scopus subject areas

  • Instrumentation
  • Computer Networks and Communications
  • Control and Optimization

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