标题：Quantum State Transfer among Three Ring-Connected Atoms
作者：Guo Yan-Qing; Deng Yao; Pei Pei; Tong Dian-Min; Wang Dian-Fu; Mi Dong
作者机构：[Guo, Y.-Q] Department of Physics, Dalian Maritime University, Dalian, 116026, China;[ Deng, Y] Department of Physics, Dalian Maritime University, Dal 更多
通讯作者地址：[Guo, YQ]Dalian Maritime Univ, Dept Phys, Dalian 116026, Peoples R China.
摘要：A robust quantum state transfer scheme is discussed for three atoms that are trapped by separated cavities linked via optical fibers in a ring connection. It is shown that, under the effective three-atom Ising model, an arbitrary unknown quantum state can be transferred from one atom to another deterministically via an auxiliary atom with maximum unit fidelity. The only required operation for this scheme is replicating turning on/off the local laser fields applied to the atoms for two steps with time cost root 2 pi/Gamma 0. The scheme is insensitive to cavity leakage and atomic position due to the condition Delta approximate to kappa >> g. Another advantage of this scheme is that the cooperative influence of spontaneous emission and operating time error can reduce the time cost for maximum fidelity and thus can speed up the implementation of quantum state transfer.