PT Journal
AU Barenboim, G
   Vives, O
TI Transplanckian inflation as gravity echoes
SO Physics Letters B
JI Phys. Lett. B
PY 2015
BP 336
EP 342
VL 748
DI 10.1016/j.physletb.2015.07.018
LA English
AB 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 accommodatea large tensor-to-scalar ratio without requiring transplanckian field values within the slow-roll regime.
ER