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Quantum Dual Signature with Coherent States Based on Chained Phase-Controlled Operations

A Self-Stabilizing Phase Decoder for Quantum Key Distribution

National Engineering Laboratory for Public Safety Risk Perception and Control by Big Data, China Academy of Electronics and Information Technology, Beijing 100041, China
Author to whom correspondence should be addressed.
Appl. Sci. 2020, 10(5), 1661;
Received: 21 January 2020 / Revised: 26 February 2020 / Accepted: 26 February 2020 / Published: 1 March 2020
(This article belongs to the Special Issue Quantum Communications and Quantum Networks)
Self-stabilization quantum key distribution (QKD) systems are often based on the Faraday magneto-optic effect such as “plug and play” QKD systems and Faraday–Michelson QKD systems. In this article, we propose a new anti-quantum-channel disturbance decoder for QKD without magneto-optic devices, which can be a benefit for the photonic integration and applications in magnetic environments. The decoder is based on a quarter-wave plate reflector–Michelson (Q–M) interferometer, with which the QKD system can be free of polarization disturbance caused by quantum channel and optical devices in the system. The theoretical analysis indicates that the Q–M interferometer is immune to polarization-induced signal fading, where the operator of the Q–M interferometer corresponding to Pauli Matrix σ2 makes it satisfy the anti-disturbance condition naturally. A Q–M interferometer based time-bin phase encoding QKD setup is demonstrated, and the experimental results show that the QKD setup works stably with a low quantum bit error rate about 1.3% for 10 h over 60.6 km standard telecommunication optical fiber. View Full-Text
Keywords: quantum key distribution; anti-quantum-channel disturbance; quarter-wave plate reflector quantum key distribution; anti-quantum-channel disturbance; quarter-wave plate reflector
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MDPI and ACS Style

Xu, H.; Wang, S.; Huang, Y.; Song, Y.; Wang, C. A Self-Stabilizing Phase Decoder for Quantum Key Distribution. Appl. Sci. 2020, 10, 1661.

AMA Style

Xu H, Wang S, Huang Y, Song Y, Wang C. A Self-Stabilizing Phase Decoder for Quantum Key Distribution. Applied Sciences. 2020; 10(5):1661.

Chicago/Turabian Style

Xu, Huaxing, Shaohua Wang, Yang Huang, Yaqi Song, and Changlei Wang. 2020. "A Self-Stabilizing Phase Decoder for Quantum Key Distribution" Applied Sciences 10, no. 5: 1661.

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