Abstract
In this paper, we propose a scheme that integrates quantum key distribution and private classical communication via continuous variables. The integrated scheme employs both quadratures of a weak coherent state, with encrypted bits encoded on the signs and Gaussian random numbers encoded on the values of the quadratures. The integration enables quantum and classical data to share the same physical and logical channel. Simulation results based on practical system parameters demonstrate that both classical communication and quantum communication can be implemented over distance of tens of kilometers, thus providing a potential solution for simultaneous transmission of quantum communication and classical communication.
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Acknowledgements
The work is supported in part by the Special Project of International Cooperation and Exchange of Ministry of Science and Technology of China (No. 2014DFA00670), the National Science & Technology Support Program (No. 2015BAK28B02), in part by the Major Project of Guizhou Province (No. [2016]3022), in part by the Science & Technology Cooperation Project of Guizhou Province (No. [2014]7002, No. [2016]7431), in part by the Science Foundation of Guizhou Province (No. [2017]1047), and in part by the Scientific Research Foundation for Talent Introduced in Guizhou University (No. [2015]45).
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Wang, T., Gong, F., Lu, A. et al. Integration of quantum key distribution and private classical communication through continuous variable. Quantum Inf Process 16, 289 (2017). https://doi.org/10.1007/s11128-017-1740-6
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DOI: https://doi.org/10.1007/s11128-017-1740-6