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Article: Phase encoding schemes for measurement-device-independent quantum key distribution with basis-dependent flaw

TitlePhase encoding schemes for measurement-device-independent quantum key distribution with basis-dependent flaw
Authors
KeywordsCoherent pulse
Current technology
Density matrix
Device models
Key generation rate
Issue Date2012
PublisherAmerican Physical Society. The Journal's web site is located at http://pra.aps.org
Citation
Physical Review A (Atomic, Molecular and Optical Physics), 2012, v. 85 n. 4, article no. 042307 How to Cite?
AbstractIn this paper, we study the unconditional security of the so-called measurement-device-independent quantum key distribution (MDIQKD) with the basis-dependent flaw in the context of phase encoding schemes. We propose two schemes for the phase encoding: The first one employs a phase locking technique with the use of non-phase-randomized coherent pulses, and the second one uses conversion of standard Bennett-Brassard 1984 (BB84) phase encoding pulses into polarization modes. We prove the unconditional security of these schemes and we also simulate the key generation rate based on simple device models that accommodate imperfections. Our simulation results show the feasibility of these schemes with current technologies and highlight the importance of the state preparation with good fidelity between the density matrices in the two bases. Since the basis-dependent flaw is a problem not only for MDIQKD but also for standard quantum key distribution (QKD), our work highlights the importance of an accurate signal source in practical QKD systems. © 2012 American Physical Society.
Persistent Identifierhttp://hdl.handle.net/10722/149037
ISSN
2014 Impact Factor: 2.808
2015 SCImago Journal Rankings: 1.418
ISI Accession Number ID
Funding AgencyGrant Number
National Institute of Information and Communications Technology (NICT) of Japan
Japan Society for the Promotion of Science (JSPS)
RGC of the HKSAR Government700709P
Natural Sciences and Engineering Research Council
Canada Research Chair program
Canadian Institute for Advanced Research (CIFAR)
QuantumWorks
Funding Information:

We thank X. Ma, M. Curty, K. Azuma, T. Yamamoto, R. Namiki, T. Honjo, H. Takesue, Y. Tokunaga, and especially G. Kato for enlightening discussions. Part of this research was conducted when K. T. and C.-H. F. F. visited the University of Toronto, and they express their sincere gratitude for all the support and hospitality that they received during their visit. This research is in part supported by the project "Secure photonic network technology" as part of "The project UQCC" by the National Institute of Information and Communications Technology (NICT) of Japan, in part by the Japan Society for the Promotion of Science (JSPS) through its Funding Program for World-Leading Innovative R&D on Science and Technology (FIRST Program)," in part by RGC Grant No. 700709P of the HKSAR Government, and also in part by Natural Sciences and Engineering Research Council, Canada Research Chair program, Canadian Institute for Advanced Research (CIFAR), and QuantumWorks.

 

DC FieldValueLanguage
dc.contributor.authorTamaki, K-
dc.contributor.authorLo, HK-
dc.contributor.authorFung, CHF-
dc.contributor.authorQi, B-
dc.date.accessioned2012-06-20T07:33:03Z-
dc.date.available2012-06-20T07:33:03Z-
dc.date.issued2012-
dc.identifier.citationPhysical Review A (Atomic, Molecular and Optical Physics), 2012, v. 85 n. 4, article no. 042307-
dc.identifier.issn1050-2947-
dc.identifier.urihttp://hdl.handle.net/10722/149037-
dc.description.abstractIn this paper, we study the unconditional security of the so-called measurement-device-independent quantum key distribution (MDIQKD) with the basis-dependent flaw in the context of phase encoding schemes. We propose two schemes for the phase encoding: The first one employs a phase locking technique with the use of non-phase-randomized coherent pulses, and the second one uses conversion of standard Bennett-Brassard 1984 (BB84) phase encoding pulses into polarization modes. We prove the unconditional security of these schemes and we also simulate the key generation rate based on simple device models that accommodate imperfections. Our simulation results show the feasibility of these schemes with current technologies and highlight the importance of the state preparation with good fidelity between the density matrices in the two bases. Since the basis-dependent flaw is a problem not only for MDIQKD but also for standard quantum key distribution (QKD), our work highlights the importance of an accurate signal source in practical QKD systems. © 2012 American Physical Society.-
dc.languageeng-
dc.publisherAmerican Physical Society. The Journal's web site is located at http://pra.aps.org-
dc.relation.ispartofPhysical Review A (Atomic, Molecular and Optical Physics)-
dc.rightsPhysical Review A (Atomic, Molecular and Optical Physics). Copyright © American Physical Society.-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectCoherent pulse-
dc.subjectCurrent technology-
dc.subjectDensity matrix-
dc.subjectDevice models-
dc.subjectKey generation rate-
dc.titlePhase encoding schemes for measurement-device-independent quantum key distribution with basis-dependent flawen_US
dc.typeArticleen_US
dc.identifier.emailFung, CHF: chffung@hku.hk-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1103/PhysRevA.85.042307-
dc.identifier.scopuseid_2-s2.0-84859797102-
dc.identifier.hkuros199941-
dc.identifier.volume85-
dc.identifier.issue4, article no. 042307-
dc.identifier.isiWOS:000302400600004-
dc.publisher.placeUnited States-

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