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Phase-encoded measurement-device-independent quantum key distribution with practical spontaneous-parametric-down-conversion sources

Measurement-device-independent quantum key distribution (MDI-QKD) with weak coherent sources has been widely and meticulously analyzed. However, the analysis for MDI-QKD with spontaneous parametric-down-conversion sources (SPDCS) is incomplete. In this paper, by accounting for practical parameters o... Full description

Journal Title: Physical Review A 11/2013, Vol.88(5)
Main Author: Zhou, Chun
Other Authors: Bao, Wan-Su , Chen, Wei , Li, Hong-Wei , Yin, Zhen-Qiang , Wang, Yang , Han, Zheng-Fu
Format: Electronic Article Electronic Article
Language: English
Subjects:
Quelle: American Physical Society (APS) (via CrossRef)
ID: ISSN: 1050-2947 ; E-ISSN: 1094-1622 ; DOI: http://dx.doi.org/10.1103/PhysRevA.88.052333
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recordid: crossref10.1103/PhysRevA.88.052333
title: Phase-encoded measurement-device-independent quantum key distribution with practical spontaneous-parametric-down-conversion sources
format: Article
creator:
  • Zhou, Chun
  • Bao, Wan-Su
  • Chen, Wei
  • Li, Hong-Wei
  • Yin, Zhen-Qiang
  • Wang, Yang
  • Han, Zheng-Fu
subjects:
  • Physics
ispartof: Physical Review A, 11/2013, Vol.88(5)
description: Measurement-device-independent quantum key distribution (MDI-QKD) with weak coherent sources has been widely and meticulously analyzed. However, the analysis for MDI-QKD with spontaneous parametric-down-conversion sources (SPDCS) is incomplete. In this paper, by accounting for practical parameters of SPDCS with thermal distribution, we presents an investigation on the performances of MDI-QKD under the active three-intensity decoy protocol and the passive one-intensity decoy protocol respectively. Phase randomization, inherently prerequisite for decoy protocol, is taken into consideration for evaluating the overall quantum bit gain and quantum bit error rate. The numerical simulations show that MDI-QKD using SPDCS with practical decoy protocols can be demonstrated comparable to the asymptotical case with infinite decoy states and has apparent superiority both in transmission distance and key generation rate compared to the MDI-QKD using weak coherent sources. Our results also indicate that MDI-QKD using thermal distributed SPDCS with active three-intensity decoy protocol performs better than the one with passive one-intensity decoy protocol.
language: eng
source: American Physical Society (APS) (via CrossRef)
identifier: ISSN: 1050-2947 ; E-ISSN: 1094-1622 ; DOI: http://dx.doi.org/10.1103/PhysRevA.88.052333
fulltext: fulltext
issn:
  • 10502947
  • 1050-2947
  • 10941622
  • 1094-1622
url: Link


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descriptionMeasurement-device-independent quantum key distribution (MDI-QKD) with weak coherent sources has been widely and meticulously analyzed. However, the analysis for MDI-QKD with spontaneous parametric-down-conversion sources (SPDCS) is incomplete. In this paper, by accounting for practical parameters of SPDCS with thermal distribution, we presents an investigation on the performances of MDI-QKD under the active three-intensity decoy protocol and the passive one-intensity decoy protocol respectively. Phase randomization, inherently prerequisite for decoy protocol, is taken into consideration for evaluating the overall quantum bit gain and quantum bit error rate. The numerical simulations show that MDI-QKD using SPDCS with practical decoy protocols can be demonstrated comparable to the asymptotical case with infinite decoy states and has apparent superiority both in transmission distance and key generation rate compared to the MDI-QKD using weak coherent sources. Our results also indicate that MDI-QKD using thermal distributed SPDCS with active three-intensity decoy protocol performs better than the one with passive one-intensity decoy protocol.
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