Accelerated expansion in a radiation dominated universe
We construct the effective field theory of a perfect fluid in the early universe. Focusing on the case where the fluid has the equation of state of radiation, we show that it may lead to corrections to the background dynamics that can dominate over those of an effective field theory of gravity alone...
| Main Authors: | , |
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| Format: | Journal article |
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2014
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| _version_ | 1797071762144362496 |
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| author | Balthazar, B Ferreira, P |
| author_facet | Balthazar, B Ferreira, P |
| author_sort | Balthazar, B |
| collection | OXFORD |
| description | We construct the effective field theory of a perfect fluid in the early universe. Focusing on the case where the fluid has the equation of state of radiation, we show that it may lead to corrections to the background dynamics that can dominate over those of an effective field theory of gravity alone. We describe the periods of accelerated expansion, in the form of inflationary and bounce solutions, that arise in the background dynamics and discuss their regime of validity within EFT. |
| first_indexed | 2024-03-06T22:57:52Z |
| format | Journal article |
| id | oxford-uuid:610c298b-1714-4fa7-8989-301ff908b072 |
| institution | University of Oxford |
| last_indexed | 2024-03-06T22:57:52Z |
| publishDate | 2014 |
| record_format | dspace |
| spelling | oxford-uuid:610c298b-1714-4fa7-8989-301ff908b0722022-03-26T17:57:09ZAccelerated expansion in a radiation dominated universeJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:610c298b-1714-4fa7-8989-301ff908b072Symplectic Elements at Oxford2014Balthazar, BFerreira, PWe construct the effective field theory of a perfect fluid in the early universe. Focusing on the case where the fluid has the equation of state of radiation, we show that it may lead to corrections to the background dynamics that can dominate over those of an effective field theory of gravity alone. We describe the periods of accelerated expansion, in the form of inflationary and bounce solutions, that arise in the background dynamics and discuss their regime of validity within EFT. |
| spellingShingle | Balthazar, B Ferreira, P Accelerated expansion in a radiation dominated universe |
| title | Accelerated expansion in a radiation dominated universe |
| title_full | Accelerated expansion in a radiation dominated universe |
| title_fullStr | Accelerated expansion in a radiation dominated universe |
| title_full_unstemmed | Accelerated expansion in a radiation dominated universe |
| title_short | Accelerated expansion in a radiation dominated universe |
| title_sort | accelerated expansion in a radiation dominated universe |
| work_keys_str_mv | AT balthazarb acceleratedexpansioninaradiationdominateduniverse AT ferreirap acceleratedexpansioninaradiationdominateduniverse |