Guido Bellomo, Mario Castagnino, Sebastian Fortin
We present a complete review of the quantum-to-classical limit of open systems by means of the theory of decoherence and the use of the Weyl- Wigner-Moyal (WWM) transformation. We show that the analytical ex- tension of the Hamiltonian provides a set of poles that can be used to (a) explain the non-unitary evolution of the relevant system and (b) com- pletely de?ne the set of preferred states that constitute the mixture into which the system decoheres: the Moving Preferred Basis. Moreover, we show that the WWM of these states are the best candidates to obtain the trajectories in the classical phase-space.
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http://arxiv.org/abs/1206.5206
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