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Decoy state quantum-key-distribution by using odd coherent states without monitoring signal disturbance

Shujing Li

College of Information Engineering, Fuyang Normal University, Fuyang 236041, China

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Hui Liu

College of Information Engineering, Fuyang Normal University, Fuyang 236041, China

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, and

Linguo Li

College of Information Engineering, Fuyang Normal University, Fuyang 236041, China

E-mail Address: llg-1212@163.com

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https://doi.org/10.1142/S0219749919500126Cited by:1 (Source: Crossref)

Abstract

Recently, a novel quantum-key-distribution (QKD) protocol, called Round-robin-differential-phase-shift (RRDPS) QKD, has been proposed to share a secure key without monitoring the signal disturbance. In this paper, we propose a decoy state RRDPS-QKD protocol with odd coherent states (OCS). We implement a one-intensity decoy state method into the RRDPS-QKD with OCS to estimate the key rate. The results show that both the maximum transmission distance and the key rate of our protocol are significantly improved. Moreover, only one-intensity decoy state is sufficient for the protocol to approach the asymptotic limit with infinite decoy states.

Keywords:

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