Covariant approach to parametrized cosmological perturbations
We present a covariant formulation for constructing general quadratic actions for cosmological perturbations, invariant under a given set of gauge symmetries for a given field content. This approach allows us to analyse scalar, vector and tensor perturbations at the same time in a straightforward ma...
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| Materiálatiipa: | Journal article |
| Almmustuhtton: |
American Physical Society
2017
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