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Your search keyword '"Lu, Weizhao"' showing total 12 results
Start Over Author "Lu, Weizhao" Publisher springer science and business media llc
12 results on '"Lu, Weizhao"'

11. Recurrent neural network approach to quantum signal: coherent state restoration for continuous-variable quantum key distribution

Author

Chunhui Huang, Lu Weizhao, Li Zhengmei, Hou Kun, Shi Liting, Qiu Jianfeng, and Zhao Huihui

Subjects
Noise (signal processing), Computer science, Statistical and Nonlinear Physics, Quantum key distribution, 01 natural sciences, Theoretical Computer Science, Electronic, Optical and Magnetic Materials, 010309 optics, Quantum neural network, Signal-to-noise ratio, Quantum cryptography, Modeling and Simulation, Qubit, 0103 physical sciences, Signal Processing, Electrical and Electronic Engineering, Quantum information, 010306 general physics, Algorithm, Quantum computer
Abstract

In continuous-variable quantum key distribution (CV-QKD), weak signal carrying information transmits from Alice to Bob; during this process it is easily influenced by unknown noise which reduces signal-to-noise ratio, and strongly impacts reliability and stability of the communication. Recurrent quantum neural network (RQNN) is an artificial neural network model which can perform stochastic filtering without any prior knowledge of the signal and noise. In this paper, a modified RQNN algorithm with expectation maximization algorithm is proposed to process the signal in CV-QKD, which follows the basic rule of quantum mechanics. After RQNN, noise power decreases about 15 dBm, coherent signal recognition rate of RQNN is 96%, quantum bit error rate (QBER) drops to 4%, which is 6.9% lower than original QBER, and channel capacity is notably enlarged.

Published
2018

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