Transplanckian inflation as gravity echoes

Autor: G. Barenboim, O. Vives
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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