Secure Quantum Key Distribution Network with Bell States and Local Unitary Operations
LI Chun-Yan1,2, ZHOU Hong-Yu1,2,3, WANG Yan1,2, DENG Fu-Guo1,2,3
1The Key Laboratory of Beam Technology and Material Modification of Ministry of Education, Beijing Normal University, Beijing 100875
2Institute of Low Energy Nuclear Physics, and Department of Material Science and Engineering, Beijing Normal University, Beijing 100875
3Beijing Radiation Center, Beijing 100875
Secure Quantum Key Distribution Network with Bell States and Local Unitary Operations
LI Chun-Yan1,2;ZHOU Hong-Yu1,2,3;WANG Yan1,2;DENG Fu-Guo1,2,3
1The Key Laboratory of Beam Technology and Material Modification of Ministry of Education, Beijing Normal University, Beijing 100875
2Institute of Low Energy Nuclear Physics, and Department of Material Science and Engineering, Beijing Normal University, Beijing 100875
3Beijing Radiation Center, Beijing 100875
Abstract： We propose a theoretical scheme for secure quantum key distribution network following the ideas in quantum dense coding. In this scheme, the server of the network provides the service for preparing and measuring the Bell states, and the users encode the states with local unitary operations. For preventing the server from eavesdropping, we design a decoy when the particle is transmitted between the users. The scheme has high capacity as one particle carries two bits of information and its efficiency for qubits approaches 100%. Moreover, it is unnecessary for the users to store the quantum states, which makes this scheme more convenient in applications than others.
LI Chun-Yan;ZHOU Hong-Yu;;WANG Yan;DENG Fu-Guo;. Secure Quantum Key Distribution Network with Bell States and Local Unitary Operations[J]. 中国物理快报, 2005, 22(5): 1049-1052.
LI Chun-Yan, ZHOU Hong-Yu, , WANG Yan, DENG Fu-Guo,. Secure Quantum Key Distribution Network with Bell States and Local Unitary Operations. Chin. Phys. Lett., 2005, 22(5): 1049-1052.
2005, Vol. 22 
