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Continuous-variable quantum deterministic key distribution protocol based on quantum teleportation

Song Han-Chong Gong Li-Hua Zhou Nan-Run

Continuous-variable quantum deterministic key distribution protocol based on quantum teleportation

Song Han-Chong, Gong Li-Hua, Zhou Nan-Run
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  • Abstract views:  1838
  • PDF Downloads:  821
  • Cited By: 0
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  • Received Date:  14 November 2011
  • Accepted Date:  29 November 2011
  • Published Online:  05 August 2012

Continuous-variable quantum deterministic key distribution protocol based on quantum teleportation

  • 1. Department of Electronic Information Engineering, Nanchang University, Nanchang 330031, China
Fund Project:  Project supported by the National Natural Science Foundation of China (Grant Nos. 10647133 and 11174118), the Natural Science Foundation of Jiangxi Province, China (Grant No. 2009GQS0080), the Research Foundation of the Education Department of Jiangxi Province (Grant No. GJJ11339), and the Scientific Research Start-up Funds for the Recruitment of Talent of Nanchang University.

Abstract: By exploiting quantum teleportation, we propose a continuous-variable quantum deterministic key distribution (CVQDKD) protocol using two-mode squeezed vacuum state and coherent state. The efficiency is 100% under the homodyne detection. The security of CVQDKD is analyzed in detail from information theory, and the result shows that the proposed protocol can securely hand over the pre-deterministic key. By contrast with the quantum random key distribution, the quantum deterministic key distribution plays an irreplaceable role in the field of key management. Furthermore, the CVQDKD can obtain a higher rate and better efficiency than the quantum deterministic key distribution protocols with discrete variables, and the quantum states used in the protocol are also easy to produce and manipulate, which i suitable for long-distance transmission. Therefore, the CVQDKD protocol is more practical.

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