Capacity theorems for covert bosonic channels

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


We study quantum-secure covert-communication over lossy thermal-noise bosonic channels, the quantum-mechanical model for many practical channels. We derive the expressions for the covert capacity of these channels: Lno-EA, when Alice and Bob share only a classical secret, and LEA, when they benefit from entanglement assistance. Entanglement assistance alters the fundamental scaling law for covert communication. Instead of Lno-EA√n−rno-EA (n), rno-EA (n) = o(√n), entanglement assistance allows LEA√n log n − rEA (n), rEA (n) = o(√n log n), covert bits to be transmitted reliably over n channel uses. However, noise in entanglement storage erases the log n gain from our achievability; work on the matching converse is ongoing.

Original languageEnglish (US)
Title of host publication2020 IEEE Information Theory Workshop, ITW 2020
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728159621
StatePublished - Apr 11 2021
Event2020 IEEE Information Theory Workshop, ITW 2020 - Virtual, Riva del Garda, Italy
Duration: Apr 11 2021Apr 15 2021

Publication series

Name2020 IEEE Information Theory Workshop, ITW 2020


Conference2020 IEEE Information Theory Workshop, ITW 2020
CityVirtual, Riva del Garda

ASJC Scopus subject areas

  • Computational Theory and Mathematics
  • Information Systems
  • Signal Processing
  • Software
  • Theoretical Computer Science


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