Invariant slow-roll parameters in scalar-tensor theories
| Autor: | Margus Saal, Mihkel Rünkla, Ott Vilson, Piret Kuusk |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Physics
Physics and Astronomy (miscellaneous) Slow roll 010308 nuclear & particles physics Scalar (physics) FOS: Physical sciences Conformal map General Relativity and Quantum Cosmology (gr-qc) Invariant (physics) 01 natural sciences General Relativity and Quantum Cosmology symbols.namesake 0103 physical sciences symbols Einstein 010306 general physics Scalar field Mathematical physics |
| DOI: | 10.48550/arxiv.1605.07033 |
| Popis: | A general scalar-tensor theory can be formulated in different parametrizations that are related by a conformal rescaling of the metric and a scalar field redefinition. We compare formulations of slow-roll regimes in the Einstein and Jordan frames using quantities that are invariant under the conformal rescaling of the metric and transform as scalar functions under the reparametrization of the scalar field. By comparing spectral indices, calculated up to second order, we find that the frames are equivalent up to this order, due to the underlying assumptions. Comment: Kindly read also our CQG+ Insight at https://cqgplus.com/2016/10/05/cqg-insight-scalar-tensor-cosmology-inflation-and-invariants/ , 29 pages, a few typos corrected, references added and updated, the text is revised in accordance with the referee's suggestions |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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