Efficient error estimation in quantum key distribution |
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Authors: | Li Mo;Patcharapong Treeviriyanupab;Zhang Chun-Mei;Yin Zhen-Qiang;Chen Wei;Han Zheng-Fu |
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Institution: | a Key Laboratory of Quantum Information, Chinese Academy of Sciences, University of Science and Technology of China, Hefei 230026, China;
b Synergetic Innovation Center of Quantum Information &; Quantum Physics, University of Science and Technology of China, Hefei 230026, China;
c Department of Computer Science, Faculty of Science and Technology, Phranakhon Rajabhat University, Bangkok, Thailand |
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Abstract: | In a quantum key distribution(QKD)system,the error rate needs to be estimated for determining the joint probability distribution between legitimate parties,and for improving the performance of key reconciliation.We propose an efficient error estimation scheme for QKD,which is called parity comparison method(PCM).In the proposed method,the parity of a group of sifted keys is practically analysed to estimate the quantum bit error rate instead of using the traditional key sampling.From the simulation results,the proposed method evidently improves the accuracy and decreases revealed information in most realistic application situations. |
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Keywords: | error estimation parity comparison quantum key distribution |
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