Four state Reference-Frame-Independent Quantum Key Distribution with the heralded pair-coherent sources

Yang Shun-Yu; Li Zheng-Hua; Wang Ji-Peng; Ma Hai-Qiang

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Four state Reference-Frame-Independent Quantum Key Distribution with the heralded pair-coherent sources

Yang Shun-Yu, Li Zheng-Hua, Wang Ji-Peng, Ma Hai-Qiang *

School of Science and State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China %

*Correspondence author

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Funding: Fundamental Research Funds for the Central Universities No. 2019XD-A02; state Key Laboratory of Information Photonics and Optical Communications （No.Beijing University of Posts and Telecommunications）

Opened online:13 March 2020

Accepted by: none

Citation: Yang Shun-Yu, Li Zheng-Hua, Wang Ji-Peng.Four state Reference-Frame-Independent Quantum Key Distribution with the heralded pair-coherent sources[OL]. [13 March 2020] http://en.paper.edu.cn/en_releasepaper/content/4751070

We propose a scheme of practical four state decoy state reference-frame-independent quantum key distribution(RFI-QKD) with the heralded pair-coherent sources (HPCS). Although fewer state is used in our scheme, its performance can approach original six-state protocol. Through utilizing HPCS, we can obviously improve the performance of four state RFI-QKD in both the final key rate and the secure transmission distance compared with the protocol using weak coherent sources. Moreover, when taking source flaws, intensity fluctuations and statistical fluctuations into consideration, simulation results show that our protocol can achieve high key generation rate at long distance transmission.

Keywords:quantum key distribution; reference-frame-independent; fewer state; heralded pair-coherent sources

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