Transplanckian inflation as gravity echoes
Autor: | G. Barenboim, O. Vives |
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Jazyk: | angličtina |
Rok vydání: | 2015 |
Předmět: | |
Zdroj: | Physics Letters B, Vol 748, Iss C, Pp 336-342 (2015) |
Druh dokumentu: | article |
ISSN: | 0370-2693 1873-2445 |
DOI: | 10.1016/j.physletb.2015.07.018 |
Popis: | In this work, we show that, in the presence of non-minimal coupling to gravity, it is possible to generate sizeable tensor modes in single-field models without transplanckian field values. These transplanckian field values apparently needed in Einstein gravity to accommodate the experimental results may only be due to our insistence of imposing a minimal coupling of the inflaton field to gravity in a model with non-minimal couplings. We present three simple single-field models that prove that it is possible to accommodate a large tensor-to-scalar ratio without requiring transplanckian field values within the slow-roll regime. |
Databáze: | Directory of Open Access Journals |
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