A general theory of linear cosmological perturbations: bimetric theories
We implement the method developed in [1] to construct the most general parametrised action for linear cosmological perturbations of bimetric theories of gravity. Specifically, we consider perturbations around a homogeneous and isotropic background, and identify the complete form of the action invari...
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| Format: | Journal article |
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Institute of Physics
2017
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| _version_ | 1797084406671736832 |
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| author | Lagos, M Ferreira, P |
| author_facet | Lagos, M Ferreira, P |
| author_sort | Lagos, M |
| collection | OXFORD |
| description | We implement the method developed in [1] to construct the most general parametrised action for linear cosmological perturbations of bimetric theories of gravity. Specifically, we consider perturbations around a homogeneous and isotropic background, and identify the complete form of the action invariant under diffeomorphism transformations, as well as the number of free parameters characterising this cosmological class of theories. We discuss, in detail, the case without derivative interactions, and compare our results with those found in massive bigravity. |
| first_indexed | 2024-03-07T01:54:51Z |
| format | Journal article |
| id | oxford-uuid:9b5d20b5-4dc6-4b5b-bee1-1a068cf00b0b |
| institution | University of Oxford |
| last_indexed | 2024-03-07T01:54:51Z |
| publishDate | 2017 |
| publisher | Institute of Physics |
| record_format | dspace |
| spelling | oxford-uuid:9b5d20b5-4dc6-4b5b-bee1-1a068cf00b0b2022-03-27T00:28:18ZA general theory of linear cosmological perturbations: bimetric theoriesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:9b5d20b5-4dc6-4b5b-bee1-1a068cf00b0bSymplectic Elements at OxfordInstitute of Physics2017Lagos, MFerreira, PWe implement the method developed in [1] to construct the most general parametrised action for linear cosmological perturbations of bimetric theories of gravity. Specifically, we consider perturbations around a homogeneous and isotropic background, and identify the complete form of the action invariant under diffeomorphism transformations, as well as the number of free parameters characterising this cosmological class of theories. We discuss, in detail, the case without derivative interactions, and compare our results with those found in massive bigravity. |
| spellingShingle | Lagos, M Ferreira, P A general theory of linear cosmological perturbations: bimetric theories |
| title | A general theory of linear cosmological perturbations: bimetric theories |
| title_full | A general theory of linear cosmological perturbations: bimetric theories |
| title_fullStr | A general theory of linear cosmological perturbations: bimetric theories |
| title_full_unstemmed | A general theory of linear cosmological perturbations: bimetric theories |
| title_short | A general theory of linear cosmological perturbations: bimetric theories |
| title_sort | general theory of linear cosmological perturbations bimetric theories |
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