Release Time:2019-03-10  Hits:

Indexed by: Journal Article

Date of Publication: 2008-02-25

Journal: PHYSICS LETTERS A

Included Journals: SCIE

Volume: 372

Issue: 9

Page Number: 1387-1390

ISSN: 0375-9601

Key Words: decoherence; Fermion environment; phase transition

Abstract: The decoherence process characterized by Loschmidt echo (LE) in a two-level system dephasingly coupled to a fermion environment with phase transitions is studied in this Letter. The results show that the LE of the two-level system may act as a witness of the environment's phase transitions, which is similar to the relation between quantum phase transitions and the LE. (c) 2007 Elsevier B.V. All rights reserved.