Quantum key distribution using basis encoding of Gaussian-modulated coherent states
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PhysRevA.97.042311.pdf
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Affiliation
Univ Arizona, Dept Mat Sci & Engn, Coll Opt Sci, Tucson, AZ 85721 USAIssue Date
2018-04-09
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AMER PHYSICAL SOCCitation
Huang, P., Huang, J., Zhang, Z., & Zeng, G. (2018). Quantum key distribution using basis encoding of Gaussian-modulated coherent states. Physical Review A, 97(4), 042311.Journal
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© 2018 American Physical Society.Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.Abstract
The continuous-variable quantum key distribution (CVQKD) has been demonstrated to be available in practical secure quantum cryptography. However, its performance is restricted strongly by the channel excess noise and the reconciliation efficiency. In this paper, we present a quantum key distribution (QKD) protocol by encoding the secret keys on the random choices of two measurement bases: the conjugate quadratures X and P. The employed encoding method can dramatically weaken the effects of channel excess noise and reconciliation efficiency on the performance of the QKD protocol. Subsequently, the proposed scheme exhibits the capability to tolerate much higher excess noise and enables us to reach a much longer secure transmission distance even at lower reconciliation efficiency. The proposal can work alternatively to strengthen significantly the performance of the known Gaussian-modulated CVQKD protocol and serve as a multiplier for practical secure quantum cryptography with continuous variables.Note
Authors retain "The right to use all or part of the Article, including the APS-prepared version without revision or modification, on the author(s)’ web home page or employer’s website and to make copies of all or part of the Article, including the APS-prepared version without revision or modification, for the author(s)’ and/or the employer’s use for educational or research purposes."ISSN
2469-99262469-9934
Version
Final published versionSponsors
National Natural Science Foundation of China [61332019, 61671287, 61631014]; National Key Research and Development Program [2016YFA0302600]Additional Links
https://link.aps.org/doi/10.1103/PhysRevA.97.042311ae974a485f413a2113503eed53cd6c53
10.1103/PhysRevA.97.042311