State Transfer and Coherence Maintain Based on DFS in Open Quantum Systems

摘要：

To maintain state coherence in an open quantum systems, the decoherence-free subspace (DFS) is an effective method. The target state is usually needed to be in DFS. In the case the target state is not in DFS, we first design external control field I to construct a DFS included target state. Then another control field II is used to transfer the state of the system to be controlled to the expected target state. As is well known, invariant set contains all stable states of the system. Control Hamiltonian is designed to shrink invariant set and increase the transition probability from the system state to target state. In such a way, the state transfer and coherence maintain are completed. Numerical simulation is given for a four-level energy open quantum system to demonstrate the effectiveness of the control strategy proposed.

关键词： Quantum system control DFS

作者: Shuang Cong Jie Yang Jianxiu Liu

作者单位: Department of Automation, University of Science and Technology of China, Hefei 230027, P. R. China

会议类型: 国际会议

会议名称: The 31st Chinese Control Conference(第三十一届中国控制会议)

会议地点: 合肥

会议语种:英文

页码: 7135-7139

在线出版日期: 2012-07-01（万方平台首次上网日期，不代表论文的发表时间）