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arXiv · 1405.6498

Transplanckian inflation as gravity echoes

G. Barenboim·O. Vives
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Abstract

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 accommodate a large tensor-to-scalar ratio without requiring transplanckian field values within the slow-roll regime.

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G. Barenboim, O. Vives. 2014-05-26. Transplanckian inflation as gravity echoes. https://arxiv.org/abs/1405.6498

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