Fresh inflation and decoherence of super Hubble fluctuations

Abstract

I study a stochastic approach to the recently introduced fresh inflation model for super Hubble scales. I find that the state loses its coherence at the end of the fresh inflationary period as a consequence of the damping of the interference function in the reduced density matrix. This fact should be a consequence of a) the relative evolutions of both the scale factor and the horizon and b) the additional thermal and dissipative effects. This implies a relevant difference with respect to supercooled inflationary scenarios which require a very rapid expansion of the scale factor to give the decoherence of super Hubble fluctuations.

version with minor changes. To appear in Phys. Rev. D

References in corpus (2)

• Fresh inflation: a warm inflationary model from a zero temperature initial state
• Coarse-grained field wave function in stochastic inflation

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• A confirmation of agreement of different approaches for scalar gauge-invariant metric perturbations during inflation
• Geometrical origin of entropy during inflation from the STM theory of gravity
• Scale invariant scalar metric fluctuations during inflation: non-perturbative formalism from a 5D vacuum
• Fresh inflation from five-dimensional vacuum state