Stabilizing Geometric Phase by Detuning in a Non-Markovian Dissipative Environment  

作　　者：肖兴 李艳玲 

机构地区：[1]College of Physics and Electronic Information, Gannan Normal University, Ganzhou 341000 [2]School of Information Engineering, Jiangxi University of Science and Technology, Ganzhou 341000

出　　处：《Chinese Physics Letters》2014年第1期10-13,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos 11247207 and 11365011, the Natural Science Foundation of Jiangxi Province under Grant Nos 20122BAB212004 and 20132BAB212008, and the Scientific Research Foundation of the Jiangxi Provincial Education Department under Grants No G J J13651.

摘　　要：The geometric phase of a two-level atom non-resonantly coupled to a non-Markovian dissipative environment is investigated. Compared to an earlier work [Chen J. J. et al. Phys. Rev. A 81 （2010）022120] in which the non-Markovian effect has a serious correction on geometric phase, we find that the geometric phase can be stabilized by detuning in non-Markovian dissipative decoherence. Moreover, the geometric phase approaches the unitary geometric phase with the increase of detuning for any initial polar angle, which shows that the geometric phase is not only resilient to the Markovian noise but is also resilient to the non-Markovian noise when a large detuning between the qubit and environment is considered. Our results may be helpful for geometric quantum computation.The geometric phase of a two-level atom non-resonantly coupled to a non-Markovian dissipative environment is investigated. Compared to an earlier work [Chen J. J. et al. Phys. Rev. A 81 （2010）022120] in which the non-Markovian effect has a serious correction on geometric phase, we find that the geometric phase can be stabilized by detuning in non-Markovian dissipative decoherence. Moreover, the geometric phase approaches the unitary geometric phase with the increase of detuning for any initial polar angle, which shows that the geometric phase is not only resilient to the Markovian noise but is also resilient to the non-Markovian noise when a large detuning between the qubit and environment is considered. Our results may be helpful for geometric quantum computation.

分 类 号：O413.1[理学—理论物理] O211.62[理学—物理]