Asynchronous measurement-device-independent quantum key distribution with hybrid source

Autor:	Bai, Jun-Lin, Xie, Yuan-Mei, Fu, Yao, Yin, Hua-Lei, Chen, Zeng-Bing
Rok vydání:	2023
Předmět:	Quantum Physics Computer Science - Cryptography and Security
Zdroj:	Opt. Lett. 48, 3551 (2023)
Druh dokumentu:	Working Paper
DOI:	10.1364/OL.491511
Popis:	The linear constraint of secret key rate capacity is overcome by the tiwn-field quantum key distribution (QKD). However, the complex phase-locking and phase-tracking technique requirements throttle the real-life applications of twin-field protocol. The asynchronous measurement-device-independent (AMDI) QKD or called mode-pairing QKD protocol can relax the technical requirements and keep the similar performance of twin-field protocol. Here, we propose an AMDI-QKD protocol with a nonclassical light source by changing the phase-randomized weak coherent state to a phase-randomized coherent-state superposition in the signal state time window. Simulation results show that our proposed hybrid source protocol significantly enhances the key rate of the AMDI-QKD protocol, while exhibiting robustness to imperfect modulation of nonclassical light sources. Comment: 9 pages, 4 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2304.04569 Zobrazit plný text záznamu View this record from Arxiv