Inflationary Spectra,Decoherence, and Two-Mode Coherent States |
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Authors: | Email author" target="_blank">David?CampoEmail author Renaud?Parentani |
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Institution: | (1) Department of Applied Mathematics, University of Waterloo, University Avenue, Waterloo, Ontario, Canada;(2) Laboratoire de Physique Théorique, CNRS UMR, Batiment, Université Paris, Orsay Cedex, France;(3) Department of Applied Mathematics, University of Waterloo, University Avenue, Waterloo, Ontario, N2L 3G1, Canada |
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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 quantum 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. |
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Keywords: | inflationary cosmology decoherence |
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