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论文类型： 期刊论文

发表时间： 2010-11-15

发表刊物： PHYSICAL REVIEW A

收录刊物： SCIE、EI、Scopus

卷号： 82

期号： 5

ISSN号： 1050-2947

摘要： Geometric phases and information flows of a two-level system coupled to its environment are calculated and analyzed. The information flow is defined as a cumulant of changes in trace distance between two quantum states, which is similar to the measure for non-Markovianity given by Breuer. We obtain an analytic relation between the geometric phase and the information flow for pure initial states, and a numerical result for mixed initial states. The geometric phase behaves differently depending on whether there are information flows back to the two-level system from its environment.