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Twin-field quantum key distribution with passive-decoy state | | Jun Teng
; Feng-Yu Lu
; Zhen-Qiang Yin
; Guan-Jie Fan-Yuan
; Rong Wang
; Shuang Wang
; Wei Chen
; Wei Huang
; Bing-Jie Xu
; Guang-Can Guo
; Zheng-Fu Han
; | | Date: |
15 Nov 2020 | | Abstract: | Twin-Field quantum key distribution (TF-QKD) and its variants, e.g.
Phase-Matching QKD, Sending-or-not-sending QKD, and No Phase Post-Selection
TFQKD promise high key rates at long distance to beat the rate distance limit
without a repeater. The security proof of these protocols are based on
decoy-state method, which is usually performed by actively modulating a
variable optical attenuator together with a random number generator in
practical experiments, however, active-decoy schemes like this may lead to side
channel and could open a security loophole. To enhance the source security of
TF-QKD, in this paper, we propose passive-decoy based TF-QKD, in which we
combine TF-QKD with the passive-decoy method. And we present a simulation
comparing the key generation rate with that in active-decoy, the result shows
our scheme performs as good as active decoy TF-QKD, and our scheme could reach
satisfactory secret key rates with just a few photon detectors. This shows our
work is meaningful in practice. | | Source: | arXiv, 2011.07443 | | Services: | Forum | Review | PDF | Favorites | |
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