Viscous modes, isocurvature perturbations and CMB initial conditions

When the predecoupling plasma is thermodinamically reversible its fluctuations are classified in terms of the adiabatic and entropic modes. A different category of physical solutions, so far unexplored, arises when the inhomogeneities of the viscosity coefficients induce computable curvature perturb...

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Autor principal: Giovannini, Massimo
Lenguaje:eng
Publicado: 2015
Materias:
Astrophysics and Astronomy
Acceso en línea:https://dx.doi.org/10.1103/PhysRevD.91.061304
http://cds.cern.ch/record/1987179
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author Giovannini, Massimo
author_facet Giovannini, Massimo
author_sort Giovannini, Massimo
collection CERN
description When the predecoupling plasma is thermodinamically reversible its fluctuations are classified in terms of the adiabatic and entropic modes. A different category of physical solutions, so far unexplored, arises when the inhomogeneities of the viscosity coefficients induce computable curvature perturbations. The viscous modes are explicitly illustrated and compared with the conventional isocurvature solutions.
id cern-1987179
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2015
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spelling cern-19871792022-08-10T13:01:05Zdoi:10.1103/PhysRevD.91.061304http://cds.cern.ch/record/1987179engGiovannini, MassimoViscous modes, isocurvature perturbations and CMB initial conditionsAstrophysics and AstronomyWhen the predecoupling plasma is thermodinamically reversible its fluctuations are classified in terms of the adiabatic and entropic modes. A different category of physical solutions, so far unexplored, arises when the inhomogeneities of the viscosity coefficients induce computable curvature perturbations. The viscous modes are explicitly illustrated and compared with the conventional isocurvature solutions.When the predecoupling plasma is thermodynamically reversible its fluctuations are classified in terms of the adiabatic and entropic modes. A different category of physical solutions, so far unexplored, arises when the inhomogeneities of the viscosity coefficients induce computable curvature perturbations. The viscous modes are explicitly illustrated and compared with the conventional isocurvature solutions.When the predecoupling plasma is thermodynamically reversible its fluctuations are classified in terms of the adiabatic and entropic modes. A different category of physical solutions, so far unexplored, arises when the inhomogeneities of the viscosity coefficients induce computable curvature perturbations. The viscous modes are explicitly illustrated and compared with the conventional isocurvature solutions.arXiv:1502.01614CERN-PH-TH-2015-059CERN-PH-TH-2015-059oai:cds.cern.ch:19871792015-02-05
spellingShingle Astrophysics and Astronomy
Giovannini, Massimo
Viscous modes, isocurvature perturbations and CMB initial conditions
title Viscous modes, isocurvature perturbations and CMB initial conditions
title_full Viscous modes, isocurvature perturbations and CMB initial conditions
title_fullStr Viscous modes, isocurvature perturbations and CMB initial conditions
title_full_unstemmed Viscous modes, isocurvature perturbations and CMB initial conditions
title_short Viscous modes, isocurvature perturbations and CMB initial conditions
title_sort viscous modes, isocurvature perturbations and cmb initial conditions
topic Astrophysics and Astronomy
url https://dx.doi.org/10.1103/PhysRevD.91.061304
http://cds.cern.ch/record/1987179
work_keys_str_mv AT giovanninimassimo viscousmodesisocurvatureperturbationsandcmbinitialconditions

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