Decoherence as a relative phenomenon: a generalization of the spin-bath model

Details Decoherence as a relative phenomenon: a generalization of the spin-bath model Decoherence as a relative phenomenon: a generalization of the spin-bath model

2009-07-11

arxiv.org/abs/0907.1933v1

Physics

Quantum Physics

25 pages, 12 figures

Scientific paper

In this paper we propose a closed-system perspective to study decoherence. From this perspective we analyze the spin-bath model as presented in the literature, and a natural generalization of that model. On the basis of the results obtained from that analysis, we argue that decoherence may be understood as a phenomenon relative to the partition of a closed system, selected in each particular case. This viewpoint frees the decoherence program from certain conceptual difficulties derived from its open-system perspective. We also argue that the usual picture of decoherence in terms of energy dissipation is misguided.

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