Non-Markovianity and Indivisible Quantum dynamics of a Apin-S System

作     者：郝翔 许雪芬 朱士群 

作者机构：Department of PhysicsRenmin University of China School of Mathematics and PhysicsSuzhou University of Science and Technology School of Physical Science and TechnologySoochow University 

出 版 物：《Communications in Theoretical Physics》 (理论物理通讯（英文版）)

年 卷 期：2013年第60卷第9期

页      面：308-312页

核心收录：

学科分类：07[理学] 0809[工学-电子科学与技术（可授工学、理学学位）] 070205[理学-凝聚态物理] 08[工学] 0704[理学-天文学] 081201[工学-计算机系统结构] 0702[理学-物理学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos.11174114 and 11174363 China Postdoctoral Science Foundation Funded Project No.2012M520494 the Basic Research Funds in Renmin University of China from the Central Government Project No.13XNLF03 the Natural Science in Nantong University under Grant No.03040813 

主　　题：non-Markovianity indivisibility quantum decoherenc 

摘      要：Using a measure for the divisibility of a dynamical map, we study the non-Markovian character of a quantum evolution of a spin-S system, which is in an external field and weakly coupled to a bosonic bath with a certain temperature. The finite-temperature dynamics of the open system is obtained by the time-convolutionless master equation in the secular approximation. Besides the influence of the environmental spectral density function, the external field and low temperatures can affect the quantum non-Markovianity. It is found out that the non-Markovian feature of a dynamical map of a high-dimensional spin system is noticeable in contrast to that of a low-dimension spin system.