Quantum Master Equations for Composite Systems: Is Born–Markov Approximation Really Valid?
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概要
- 論文の詳細を見る
Markovian quantum master equations are generally thought to satisfy the following three conditions: (i) they describe the dynamics of time scales that are larger than the reservoir correlation time scale, (ii) these stationary solutions give the thermal equilibrium states with a reservoir, and (iii) they can be written in the Lindblad form. In fact, for single systems such as a single harmonic oscillator and a single two-level system, Markovian quantum master equations satisfying all these conditions can be obtained. However, for composite systems, which consist of more than one subsystem coupled with each other, such equations have not been obtained thus far. In this study, we found that we cannot use the Born–Markov approximation for obtaining quantum master equations for composite systems in the strong-coupling regime, no matter how short the reservoir correlation time is.
- Physical Society of Japanの論文
- 2010-08-15
著者
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Ogawa Tetsuo
Department Of Anatomy I Showa University School Of Medicine
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Masatoshi Nakatani
Department of Physics, Osaka University and CREST, JST, Machikaneyama, Toyonaka, Osaka 560-0043, Japan
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Nakatani Masatoshi
Department of Physics, Osaka University and CREST, JST, Machikaneyama, Toyonaka, Osaka 560-0043, Japan
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Tetsuo Ogawa
Department of Physics, Osaka University and CREST, JST, Machikaneyama, Toyonaka, Osaka 560-0043, Japan
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- Erratum: ``Quantum Master Equations for Composite Systems: Is Born--Markov Approximation Really Valid?''