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

doi:10.1088/1367-2630/abbab7

New Journal of Physics (Jan 2020)

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

Affiliations

Jun Teng: CAS Key Laboratory of Quantum Information, University of Science and Technology of China , Hefei 230026, People’s Republic of China; Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China , Hefei, Anhui 230026, People’s Republic of China; State Key Laboratory of Cryptography , P. O. Box 5159, Beijing 100878, People’s Republic of China
Feng-Yu Lu: CAS Key Laboratory of Quantum Information, University of Science and Technology of China , Hefei 230026, People’s Republic of China; Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China , Hefei, Anhui 230026, People’s Republic of China; State Key Laboratory of Cryptography , P. O. Box 5159, Beijing 100878, People’s Republic of China
Zhen-Qiang Yin: ORCiD; CAS Key Laboratory of Quantum Information, University of Science and Technology of China , Hefei 230026, People’s Republic of China; Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China , Hefei, Anhui 230026, People’s Republic of China; State Key Laboratory of Cryptography , P. O. Box 5159, Beijing 100878, People’s Republic of China
Guan-Jie Fan-Yuan: CAS Key Laboratory of Quantum Information, University of Science and Technology of China , Hefei 230026, People’s Republic of China; Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China , Hefei, Anhui 230026, People’s Republic of China; State Key Laboratory of Cryptography , P. O. Box 5159, Beijing 100878, People’s Republic of China
Rong Wang: CAS Key Laboratory of Quantum Information, University of Science and Technology of China , Hefei 230026, People’s Republic of China; Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China , Hefei, Anhui 230026, People’s Republic of China; State Key Laboratory of Cryptography , P. O. Box 5159, Beijing 100878, People’s Republic of China
Shuang Wang: CAS Key Laboratory of Quantum Information, University of Science and Technology of China , Hefei 230026, People’s Republic of China; Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China , Hefei, Anhui 230026, People’s Republic of China; State Key Laboratory of Cryptography , P. O. Box 5159, Beijing 100878, People’s Republic of China
Wei Chen: CAS Key Laboratory of Quantum Information, University of Science and Technology of China , Hefei 230026, People’s Republic of China; Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China , Hefei, Anhui 230026, People’s Republic of China; State Key Laboratory of Cryptography , P. O. Box 5159, Beijing 100878, People’s Republic of China
Wei Huang: Science and Technology on Communication Security Laboratory, Institute of Southwestern Communication , Chengdu, Sichuan 610041, People’s Republic of China
Bing-Jie Xu: Science and Technology on Communication Security Laboratory, Institute of Southwestern Communication , Chengdu, Sichuan 610041, People’s Republic of China
Guang-Can Guo: CAS Key Laboratory of Quantum Information, University of Science and Technology of China , Hefei 230026, People’s Republic of China; Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China , Hefei, Anhui 230026, People’s Republic of China; State Key Laboratory of Cryptography , P. O. Box 5159, Beijing 100878, People’s Republic of China
Zheng-Fu Han: CAS Key Laboratory of Quantum Information, University of Science and Technology of China , Hefei 230026, People’s Republic of China; Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China , Hefei, Anhui 230026, People’s Republic of China; State Key Laboratory of Cryptography , P. O. Box 5159, Beijing 100878, People’s Republic of China

DOI: https://doi.org/10.1088/1367-2630/abbab7
Journal volume & issue: Vol. 22, no. 10
p. 103017

Abstract

Read online

Twin-Field quantum key distribution (TF-QKD) and its variants, e.g. phase-maching 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.

Published in New Journal of Physics

ISSN: 1367-2630 (Online)
Publisher: IOP Publishing
Country of publisher: United Kingdom
LCC subjects: Science: Physics
Website: https://iopscience.iop.org/journal/1367-2630

About the journal

Abstract

Keywords