How Phase Transitions induce classical behaviour

Details How Phase Transitions induce classical behaviour How Phase Transitions induce classical behaviour

2004-12-21

arxiv.org/abs/hep-th/0412259v1

Int.J.Theor.Phys. 44 (2005) 1855-1874

Physics

High Energy Physics

High Energy Physics - Theory

10 pages, 1 figure: To be published in the International Journal of Theoretical Physics (2005) as part of the Proceedings of t

Scientific paper

10.1007/s10773-005-8899-6

We continue the analysis of the onset of classical behaviour in a scalar field after a continuous phase transition, in which the system-field, the long wavelength order parameter of the model, interacts with an environment, of its own short-wavelength modes and other fields, neutral and charged, with which it is expected to interact. We compute the decoherence time for the system-field modes from the master equation and directly from the decoherence functional (with identical results). In simple circumstances the order parameter field is classical by the time the transition is complete.

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