Defining the moving preferred basis

There are many formalisms to describe quantum decoherence. However, many of them give a non general and ad hoc definition of "pointer basis" or "moving preferred basis", and this fact is a problem for the decoherence program. In this paper we will consider quantum systems under a general theoretical framework for decoherence and present a very general definition of the moving preferred basis. In addition, this definition is implemented in a well known model and the time of decoherence and the relaxation time are defined and compared with those of this model.

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