中国物理B ›› 2009, Vol. 18 ›› Issue (11): 4690-4694.doi: 10.1088/1674-1056/18/11/013
顾斌, 李传起, 徐飞, 陈玉林
Gu Bin(顾斌)†, Li Chuan-Qi(李传起), Xu Fei(徐飞), and Chen Yu-Lin(陈玉林)
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.
中图分类号: (Quantum cryptography and communication security)