Alternative non-Markovianity measure by divisibility of dynamical maps

被引：96
|
作者：
Hou, S. C. [1 ]
Yi, X. X. [1 ,2 ,3 ]
Yu, S. X. [2 ,3 ,4 ,5 ]
Oh, C. H. [2 ,3 ]
机构：
[1] Dalian Univ Technol, Sch Phys & Optoelect Technol, Dalian 116024, Peoples R China
[2] Natl Univ Singapore, Ctr Quantum Technol, Singapore 117543, Singapore
[3] Natl Univ Singapore, Dept Phys, Singapore 117543, Singapore
[4] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China
[5] Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Anhui, Peoples R China
来源：
PHYSICAL REVIEW A | 2011年 / 83卷 / 06期
基金：
新加坡国家研究基金会;
关键词：
D O I：
10.1103/PhysRevA.83.062115
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
By identifying non-Markovianity with nondivisibility, we propose a measure of non-Markovianity for quantum processes. Three examples are presented, and the measure of non-Markovianity is calculated and discussed for these examples. Comparisons with other measures of non-Markovianity are made. The present non-Markovianity measure has the merit that no optimization procedure is required and it is finite for any quantum process, which greatly enhances the practical relevance of the proposed measure.
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页数：6
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