Inflationary spectra, decoherence, and two-mode coherent states

Abstract

We re-examine the question of the entropy stored in the distribution of primordial density fluctuations. To this end we make use of two-mode coherent states. These states incorporate the isotropy of the distribution as well as the temporal coherence and the semi-classical character of highly amplified modes. They also provide a lower bound for the entropy if, as one expects, decoherence processes erase the squeezing which originally characterized the distribution in inflationary models. This lower bound is one half the maximal (thermal) value. By considering backreaction effects, we also provide an upper bound for this entropy at the onset of the adiabatic era.

19 pages, Latex

References in corpus (4)

• A Primer for Black Hole Quantum Physics
• Symplectic invariants, entropic measures and correlations of Gaussian states
• Space-time correlations in inflationary spectra, a wave packet analysis
• The Inflationary Paradigm: Predictions for CMB

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• Entropy and Correlators in Quantum Field Theory
• Dynamical Casimir Effect in dissipative media: When is the final state non-separable ?
• Analytical description of quantum emission in optical analogues to gravity
• Understanding Squeezed States of Light Through Wigner's Phase-Space