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Quantum Cryptography Security Quantum Simulation

Improvement of two-way continuous-variable quantum key distribution using optical amplifiers

arXiv
Authors: Yi-Chen Zhang, Zhengyu Li, Christian Weedbrook, Song Yu, Wanyi Gu, Maozhu Sun, Xiang Peng, Hong Guo

Year

2013

Paper ID

33467

Status

Preprint

Abstract Read

~2 min

Abstract Words

107

Citations

N/A

Abstract

The imperfections of a receiver's detector affect the performance of two-way continuous-variable quantum key distribution protocols and are difficult to adjust in practical situations. We propose a method to improve the performance of two-way continuous-variable quantum key distribution by adding a parameter-adjustable optical amplifier at the receiver. A security analysis is derived against a two-mode collective entangling cloner attack. Our simulations show that the proposed method can improve the performance of protocols as long as the inherent noise of the amplifier is lower than a critical value, defined as the tolerable amplifier noise. Furthermore, the optimal performance can approach the scenario where a perfect detector is used.

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  • The imperfections of a receiver's detector affect the performance of two-way continuous-variable quantum key distribution protocols and are difficult to adjust in practical...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1307.7590 [2] arXiv https://arxiv.org/abs/1307.7590 [3] Publisher https://arxiv.org/abs/1307.7590

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