期刊
PHYSICS LETTERS A
卷 374, 期 23, 页码 2324-2330出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physleta.2010.03.066
关键词
Exact reduced dynamics; Quantum master equation; Relaxation process
An exact reduced density operator of a quantum system interacting with a bosonic thermal reservoir is derived by means of the simple algebraic method. The necessary and sufficient condition is found that the time-convolutionless master equation becomes exact up to the second order with respect to the system-reservoir interaction. The result is examined by means of the boson-detector model. The reduced dynamics of a quantum system interacting with a classical reservoir is also discussed. (C) 2010 Elsevier B.V. All rights reserved.
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