Abstract
An open quantum system is considered as being a subsystem of a larger closed quantum system. We discuss the problem, how one can decompose the closed system into the open system and a heat bath and, correspondingly, the time evolution of the closed system into a free evolution of system and bath and an interaction part. As an illustration of the general theory we discuss this problem in the simple case of certain open two-level quantum systems.
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Kümmerer, B. (1994). How to Reconstruct a Heat Bath. In: Fannes, M., Maes, C., Verbeure, A. (eds) On Three Levels. NATO ASI Series, vol 324. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-2460-1_10
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DOI: https://doi.org/10.1007/978-1-4615-2460-1_10
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