中国物理B ›› 2009, Vol. 18 ›› Issue (11): 4690-4694.doi: 10.1088/1674-1056/18/11/013

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High-capacity three-party quantum secret sharing with superdense coding

顾斌, 李传起, 徐飞, 陈玉林   

  1. College of Math and Physics, Nanjing University of Information Science and Technology (NUIST), Nanjing 210044, China
  • 收稿日期:2009-01-16 修回日期:2009-02-13 出版日期:2009-11-20 发布日期:2009-11-20
  • 基金资助:
    Project supported by the National Natural Science Foundation (NSF) of China (Grant No 10847147), the NSF of Jiangsu Province, China (Grant No BK2008437) and Jiangsu Provincial Universities (Grant No　07KJB510066) and the Science Foundation of NUIST, China.

High-capacity three-party quantum secret sharing with superdense coding

Gu Bin(顾斌)†, Li Chuan-Qi(李传起), Xu Fei(徐飞), and Chen Yu-Lin(陈玉林)   

  1. College of Math and Physics, Nanjing University of Information Science and Technology (NUIST), Nanjing 210044, China
  • Received:2009-01-16 Revised:2009-02-13 Online:2009-11-20 Published:2009-11-20
  • Supported by:
    Project supported by the National Natural Science Foundation (NSF) of China (Grant No 10847147), the NSF of Jiangsu Province, China (Grant No BK2008437) and Jiangsu Provincial Universities (Grant No　07KJB510066) and the Science Foundation of NUIST, China.

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摘要： This paper presents a scheme for high-capacity three-party quantum secret sharing with quantum superdense coding, following some ideas in the work by Liu et al (2002 Phys. Rev. A 65 022304) and the quantum secret sharing scheme by Deng et al (2008 Phys. Lett. A 372 1957). Instead of using two sets of nonorthogonal states, the boss Alice needs only to prepare a sequence of Einstein--Podolsky--Rosen pairs in d-dimension. The two agents Bob and Charlie encode their information with dense coding unitary operations, and security is checked by inserting decoy photons. The scheme has a high capacity and intrinsic efficiency as each pair can carry 2lbd bits of information, and almost all the pairs can be used for carrying useful information.

Abstract: This paper presents a scheme for high-capacity three-party quantum secret sharing with quantum superdense coding, following some ideas in the work by Liu et al (2002 Phys. Rev. A 65 022304) and the quantum secret sharing scheme by Deng et al (2008 Phys. Lett. A 372 1957). Instead of using two sets of nonorthogonal states, the boss Alice needs only to prepare a sequence of Einstein--Podolsky--Rosen pairs in d-dimension. The two agents Bob and Charlie encode their information with dense coding unitary operations, and security is checked by inserting decoy photons. The scheme has a high capacity and intrinsic efficiency as each pair can carry 2lbd bits of information, and almost all the pairs can be used for carrying useful information.

Key words: quantum secret sharing, three-party, high-capacity, superdense coding

中图分类号:  (Quantum cryptography and communication security)

  • 03.67.Dd
42.50.-p (Quantum optics)