Multiparty Quantum Secret Sharing of Classical Message using Cavity Quantum Electrodynamic System
HAN Lian-Fang1, LIU Yi-Min2,3, ZHANG Zhan-Jun1,3
1Key Laboratory of Optoelectronic Information Acquisition and Manipulation of Ministry of Education, School of Physics and Material Science, Anhui University, Hefei 230039
2Department of Physics, Shaoguan University, Shaoguan 512005
3The State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071
Multiparty Quantum Secret Sharing of Classical Message using Cavity Quantum Electrodynamic System
HAN Lian-Fang1;LIU Yi-Min2,3;ZHANG Zhan-Jun1,3
1Key Laboratory of Optoelectronic Information Acquisition and Manipulation of Ministry of Education, School of Physics and Material Science, Anhui University, Hefei 230039
2Department of Physics, Shaoguan University, Shaoguan 512005
3The State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071
Abstract： An experimental feasible scheme of multiparty secret sharing of classical messages is proposed, based on a cavity quantum electrodynamic system. The secret messages are imposed on atomic Bell states initially in the sender's possession by local unitary operations. By swapping quantum entanglement of atomic Bell states, the secret messages are split into several parts and each part is distributed to a separate party. In this case, any subset of the entire party group can not read out the secret message but the entirety via mutual ooperations. In this scheme, to discriminate atomic Bell states, additional classical fields are employed besides the same highly-detuned single-mode cavities used to prepare atomic Bell states. This scheme is insensitive to the cavity decay and the thermal field, and usual joint Bell-state measurements are unnecessary.
2006, Vol. 23 
