Accelerating cosmological expansion from shear and bulk viscosity

The dissipation of energy from local velocity perturbations in the cosmological fluid affects the time evolution of spatially averaged fluid dynamic fields and the cosmological solution of Einstein's field equations. We show how this backreaction effect depends on shear and bulk viscosity and o...

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Detalles Bibliográficos
Autores principales: Floerchinger, Stefan, Tetradis, Nikolaos, Wiedemann, Urs Achim
Lenguaje:eng
Publicado: 2014
Materias:
General Relativity and Cosmology
Acceso en línea:https://dx.doi.org/10.1103/PhysRevLett.114.091301
http://cds.cern.ch/record/1969160
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author Floerchinger, Stefan
Tetradis, Nikolaos
Wiedemann, Urs Achim
author_facet Floerchinger, Stefan
Tetradis, Nikolaos
Wiedemann, Urs Achim
author_sort Floerchinger, Stefan
collection CERN
description The dissipation of energy from local velocity perturbations in the cosmological fluid affects the time evolution of spatially averaged fluid dynamic fields and the cosmological solution of Einstein's field equations. We show how this backreaction effect depends on shear and bulk viscosity and other material properties of the dark sector, as well as the spectrum of perturbations. If sufficiently large, this effect could account for the acceleration of the cosmological expansion.
id cern-1969160
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2014
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spelling cern-19691602023-03-14T17:48:24Zdoi:10.1103/PhysRevLett.114.091301http://cds.cern.ch/record/1969160engFloerchinger, StefanTetradis, NikolaosWiedemann, Urs AchimAccelerating cosmological expansion from shear and bulk viscosityGeneral Relativity and CosmologyThe dissipation of energy from local velocity perturbations in the cosmological fluid affects the time evolution of spatially averaged fluid dynamic fields and the cosmological solution of Einstein's field equations. We show how this backreaction effect depends on shear and bulk viscosity and other material properties of the dark sector, as well as the spectrum of perturbations. If sufficiently large, this effect could account for the acceleration of the cosmological expansion.The dissipation of energy from local velocity perturbations in the cosmological fluid affects the time evolution of spatially averaged fluid dynamic fields and the cosmological solution of Einstein’s field equations. We show how this backreaction effect depends on shear and bulk viscosity and other material properties of the dark sector, as well as the spectrum of perturbations. If sufficiently large, this effect could account for the acceleration of the cosmological expansion.The dissipation of energy from local velocity perturbations in the cosmological fluid affects the time evolution of spatially averaged fluid dynamic fields and the cosmological solution of Einstein's field equations. We show how this backreaction effect depends on shear and bulk viscosity and other material properties of the dark sector, as well as the spectrum of perturbations. If sufficiently large, this effect could account for the acceleration of the cosmological expansion.arXiv:1411.3280CERN-PH-TH-2014-224CERN-PH-TH-2014-224oai:cds.cern.ch:19691602014-11-11
spellingShingle General Relativity and Cosmology
Floerchinger, Stefan
Tetradis, Nikolaos
Wiedemann, Urs Achim
Accelerating cosmological expansion from shear and bulk viscosity
title Accelerating cosmological expansion from shear and bulk viscosity
title_full Accelerating cosmological expansion from shear and bulk viscosity
title_fullStr Accelerating cosmological expansion from shear and bulk viscosity
title_full_unstemmed Accelerating cosmological expansion from shear and bulk viscosity
title_short Accelerating cosmological expansion from shear and bulk viscosity
title_sort accelerating cosmological expansion from shear and bulk viscosity
topic General Relativity and Cosmology
url https://dx.doi.org/10.1103/PhysRevLett.114.091301
http://cds.cern.ch/record/1969160
work_keys_str_mv AT floerchingerstefan acceleratingcosmologicalexpansionfromshearandbulkviscosity
AT tetradisnikolaos acceleratingcosmologicalexpansionfromshearandbulkviscosity
AT wiedemannursachim acceleratingcosmologicalexpansionfromshearandbulkviscosity

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