Distribution of non-Markovian intervals for open qubit systems  

作　　者：郑艳萍 唐宁 王国友 曾浩生 

机构地区：[1]Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education,and Department of Physics,Hunan Normal University

出　　处：《Chinese Physics B》2011年第11期47-52,共6页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.11075050);the National Key Basic Research Program of China(Grant No.2007CB925204);the Construct Program of the National Key Discipline Ministry of Education of China

摘　　要：We study the non-Markovianity of open qubit systems using the measure N proposed by Breuer, Laine and Piilo [Phys. Rev. Lett. 103 210401 （2009）]. We find that for the three types of quantum noises, amplitude-damping, dephasing and depolarizing noises, there exist some non-Markovian time intervals whose distribution is independent of the selection of the pair of initial states. Therefore, the maximization in the definition of measure N can be actually removed without influencing the detection of non-Markovianity.We study the non-Markovianity of open qubit systems using the measure N proposed by Breuer, Laine and Piilo [Phys. Rev. Lett. 103 210401 （2009）]. We find that for the three types of quantum noises, amplitude-damping, dephasing and depolarizing noises, there exist some non-Markovian time intervals whose distribution is independent of the selection of the pair of initial states. Therefore, the maximization in the definition of measure N can be actually removed without influencing the detection of non-Markovianity.

关 键 词：open quantum system non-Markovianity non-Markovian interval 

分 类 号：O413.1[理学—理论物理]