Abstract

Quantum secret sharing (QSS) allows multiple players to achieve unconditional secure communication through an unsecure quantum channel; however, the actual implementation requires a modulator with a high extinction ratio, which means high system expense and miniaturization and commercialization difficulties. In this paper, we propose a continuous variable QSS scheme that can replace the traditional lasers and modulators with directly modulated lasers (DML). Each player prepares quantum states through a DML and sends the signal light to the dealer through a beam splitter into a quantum channel. The method provides a new way for realizing secret key sharing. Moreover, we introduce the chirp estimation algorithm to realize the phase modulation, which can achieve a two-dimensional modulation scheme under a single laser.

© 2021 Optical Society of America

Practical continuous-variable quantum secret sharing using plug-and-play dual-phase modulation

Qin Liao, Haijie Liu, Yupeng Gong, Zheng Wang, Qingquan Peng, and Ying Guo
Opt. Express 30(3) 3876-3892 (2022)

Secure quantum secret sharing without signal disturbance monitoring

Jie Gu, Yuan-Mei Xie, Wen-Bo Liu, Yao Fu, Hua-Lei Yin, and Zeng-Bing Chen
Opt. Express 29(20) 32244-32255 (2021)

Differential phase shift quantum secret sharing using a twin field

Jie Gu, Xiao-Yu Cao, Hua-Lei Yin, and Zeng-Bing Chen
Opt. Express 29(6) 9165-9173 (2021)

Differential-phase-shift quantum secret sharing

K. Inoue, T. Ohashi, T. Kukita, K. Watanabe, S. Hayashi, T. Honjo, and H. Takesue
Opt. Express 16(20) 15469-15476 (2008)

Experimental circular quantum secret sharing over telecom fiber network

Ke-Jin Wei, Hai-Qiang Ma, and Jian-Hui Yang
Opt. Express 21(14) 16663-16669 (2013)