Relay-Assisted Free-Space Quantum-Key Distribution

Majid Safari*, Murat Uysal

*Corresponding author for this work

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

Abstract

In this paper, we investigate a terrestrial relay-assisted scheme for a free-space quantum key distribution (QKD) system based on BB84 protocol. We consider the deployment of passive relays which simply redirect (i.e., collect and point) the qubits to the next relay node or to the receiver without performing any measurement or detection process. Based on a near-field analysis, we derive an upper bound on quantum bit error rate (QBER) of the relay-assisted QKD system. Our results demonstrate that the relay-assisted scheme is able to outperform point-to-point direct transmission for long link ranges in which turbulence effects are particularly degrading.

Original languageEnglish
Title of host publication2009 11TH CANADIAN WORKSHOP ON INFORMATION THEORY
Place of PublicationNEW YORK
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages112-117
Number of pages6
ISBN (Print)978-1-4244-3400-8
Publication statusPublished - 2009
Event11th Canadian Workshop on Information Theory - Ottawa, Canada
Duration: 13 May 200915 May 2009

Conference

Conference11th Canadian Workshop on Information Theory
Country/TerritoryCanada
Period13/05/0915/05/09

Keywords

  • OPTICAL COMMUNICATION
  • CRYPTOGRAPHY
  • DAYLIGHT
  • PHOTONS

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