NDLI: A Continuous Variable Quantum Key Distribution Protocol Based on Entanglement Swapping of Quasi-Bell Entangled Coherent States

Content Provider	Springer Nature Link
Author	Dong, Li Wang, Jun Xi Xiu, Xiao Ming Li, Dan Gao, Ya Jun Yi, X. X.
Copyright Year	2014
Abstract	A continuous variable quantum key distribution protocol with entanglement swapping of quasi-Bell entangled coherent states is proposed. As the preliminary step, a sender shares quasi-Bell entangled coherent states with a receiver. After their measurements to distinguish the cases of a zero response, a nonzero even-photon response and an odd-photon response, two legitimate participants fulfill the task of key distribution. The correlations resulting from entanglement swapping of quasi-Bell entangled coherent states and the order rearrangement of transmitted states provide the possibility to protect secret key distribution. In the ideal channel, the success probability increases with the amplitude of the coherent state, and approaches unity when the amplitude of the coherent state is larger than two. However, in the loss channel, the decoherence will introduce error in the generated key, and the error rate increases with the amplitude of the coherent state. When the amplitude of the coherent state is smaller than 0.2 (or so), the error rate approaches zero, although the success probability is less than 0.5 in this case.
Starting Page	3173
Ending Page	3190
Page Count	18
File Format	PDF
ISSN	00207748
Journal	International Journal of Theoretical Physics
Volume Number	53
Issue Number	9
e-ISSN	15729575
Language	English
Publisher	Springer US
Publisher Date	2014-05-23
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Continuous variable quantum key distribution Entanglement swapping Quasi-Bell entangled coherent state Physics Quantum Physics Elementary Particles, Quantum Field Theory Theoretical, Mathematical and Computational Physics
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy Mathematics

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