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Quantum Information Processing

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01-10-2017

Parameter optimization in biased decoy-state quantum key distribution with both source errors and statistical fluctuations

Authors: Jian-Rong Zhu, Jian Li, Chun-Mei Zhang, Qin Wang

Published in: Quantum Information Processing | Issue 10/2017

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Abstract

The decoy-state method has been widely used in commercial quantum key distribution (QKD) systems. In view of the practical decoy-state QKD with both source errors and statistical fluctuations, we propose a universal model of full parameter optimization in biased decoy-state QKD with phase-randomized sources. Besides, we adopt this model to carry out simulations of two widely used sources: weak coherent source (WCS) and heralded single-photon source (HSPS). Results show that full parameter optimization can significantly improve not only the secure transmission distance but also the final key generation rate. And when taking source errors and statistical fluctuations into account, the performance of decoy-state QKD using HSPS suffered less than that of decoy-state QKD using WCS.

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Title: Parameter optimization in biased decoy-state quantum key distribution with both source errors and statistical fluctuations
Authors: Jian-Rong Zhu
Jian Li
Chun-Mei Zhang
Qin Wang
Publication date: 01-10-2017
Publisher: Springer US
Published in: Quantum Information Processing / Issue 10/2017
Print ISSN: 1570-0755
Electronic ISSN: 1573-1332
DOI: https://doi.org/10.1007/s11128-017-1687-7

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