Research on Continuous Variable Quantum Cryptography with Unbalanced Basis Choice

doi:10.13190/j.jbupt.2016.02.008

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2016, Vol. 39 ›› Issue (2): 39-42.doi: 10.13190/j.jbupt.2016.02.008

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Research on Continuous Variable Quantum Cryptography with Unbalanced Basis Choice

CHU Chun-yan¹, XIA Xu-jun², ZHANG Sheng-li³

1. Nanjing Information Center, Nanjing 210019, China;
2. PLA 96518 Division, Huaihua 418000, China;
3. PLA Information Engineering University, Zhengzhou 450001, China

Received:2015-05-15 Online:2016-04-28 Published:2016-04-28

Abstract

Abstract:

With its security based on quantum no-cloning and Heisenberg uncertainty relation, the quantum cryptography is a newly developed key distribution protocol. The recent research on continuous variable quantum cryptography assumes that the choice of basis is balanced. However, the performance of continuous variable quantum cryptography is an interesting but open question. By introducing the asymmetry in the shared bipartite two-mode entanglement state, the secret key rate was improved with unbalanced basis. Furthermore, numerical simulations with typical continuous variable quantum key distribution experiment show that the secure distance can be prolonged by 20km for a given secure key rate.

Key words: continuous variable, quantum cryptography, unbalanced basis, local squeezing

CLC Number:

O431.2

CHU Chun-yan, XIA Xu-jun, ZHANG Sheng-li. Research on Continuous Variable Quantum Cryptography with Unbalanced Basis Choice[J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2016, 39(2): 39-42.

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Research on Continuous Variable Quantum Cryptography with Unbalanced Basis Choice

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