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Title: Entropy of a classical stochastic field and cosmological perturbations

Abstract

We propose a general definition of nonequilibrium entropy of a classical stochastic field. As an example of particular interest in cosmology we apply this definition to compute the entropy of density perturbations in an inflationary Universe. On the scales of structures in the Universe, the entropy of density perturbations dominates over the statistical fluctuations of the entropy of cosmic microwave photons, indicating the relevance of the entropy of density fluctuations for structure formation.

Authors:
; ;  [1]
  1. Physics Department, Brown University, Providence, Rhode Island 02912 (United States) Institute of Theoretical Physics, Eidgenoessische Technische Hochschule Hoenggerberg, CH-8093 Zuerich (Switzerland) Institute for Theoretical Physics, University of California, Santa Barbara, California 93106 (United States)
Publication Date:
OSTI Identifier:
6892914
DOE Contract Number:  
AC02-76ER03130
Resource Type:
Journal Article
Journal Name:
Physical Review Letters; (United States)
Additional Journal Information:
Journal Volume: 69:25; Journal ID: ISSN 0031-9007
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; COSMOLOGY; PERTURBATION THEORY; QUANTUM FIELD THEORY; STOCHASTIC PROCESSES; CALCULATION METHODS; CORRELATIONS; COSMIC RADIATION; ENTROPY; INFLATIONARY UNIVERSE; PROBABILITY; SCALAR FIELDS; COSMOLOGICAL MODELS; FIELD THEORIES; IONIZING RADIATIONS; MATHEMATICAL MODELS; PHYSICAL PROPERTIES; RADIATIONS; THERMODYNAMIC PROPERTIES; 662110* - General Theory of Particles & Fields- Theory of Fields & Strings- (1992-)

Citation Formats

Brandenberger, R, Mukhanov, V, and Prokopec, T. Entropy of a classical stochastic field and cosmological perturbations. United States: N. p., 1992. Web. doi:10.1103/PhysRevLett.69.3606.
Brandenberger, R, Mukhanov, V, & Prokopec, T. Entropy of a classical stochastic field and cosmological perturbations. United States. https://doi.org/10.1103/PhysRevLett.69.3606
Brandenberger, R, Mukhanov, V, and Prokopec, T. 1992. "Entropy of a classical stochastic field and cosmological perturbations". United States. https://doi.org/10.1103/PhysRevLett.69.3606.
@article{osti_6892914,
title = {Entropy of a classical stochastic field and cosmological perturbations},
author = {Brandenberger, R and Mukhanov, V and Prokopec, T},
abstractNote = {We propose a general definition of nonequilibrium entropy of a classical stochastic field. As an example of particular interest in cosmology we apply this definition to compute the entropy of density perturbations in an inflationary Universe. On the scales of structures in the Universe, the entropy of density perturbations dominates over the statistical fluctuations of the entropy of cosmic microwave photons, indicating the relevance of the entropy of density fluctuations for structure formation.},
doi = {10.1103/PhysRevLett.69.3606},
url = {https://www.osti.gov/biblio/6892914}, journal = {Physical Review Letters; (United States)},
issn = {0031-9007},
number = ,
volume = 69:25,
place = {United States},
year = {Mon Dec 21 00:00:00 EST 1992},
month = {Mon Dec 21 00:00:00 EST 1992}
}