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 other...
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| Main Authors: | , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
3 March 2015
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| In: |
Physical review letters
Year: 2015, Volume: 114, Issue: 9, Pages: 091301 |
| ISSN: | 1079-7114 |
| DOI: | 10.1103/PhysRevLett.114.091301 |
| Online Access: | Verlag, Volltext: http://dx.doi.org/10.1103/PhysRevLett.114.091301 Verlag, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.114.091301 
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| Author Notes: | Stefan Floerchinger, Nikolaos Tetradis, and Urs Achim Wiedemann |
| Summary: | 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. |
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| Item Description: | Gesehen am 24.11.2017 |
| Physical Description: | Online Resource |
| ISSN: | 1079-7114 |
| DOI: | 10.1103/PhysRevLett.114.091301 |