Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2010-11-15

Journal: PHYSICAL REVIEW A

Included Journals: Scopus、EI、SCIE

Volume: 82

Issue: 5

ISSN: 1050-2947

Abstract: 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.