6533b86cfe1ef96bd12c8a63
RESEARCH PRODUCT
Transplanckian inflation as gravity echoes
Oscar VivesGabriela Barenboimsubject
High Energy Physics - TheoryNuclear and High Energy PhysicsGravity (chemistry)Cosmology and Nongalactic Astrophysics (astro-ph.CO)Field (physics)FOS: Physical sciences01 natural sciencesGravitationTheoretical physicsGeneral Relativity and Quantum CosmologyHigh Energy Physics - Phenomenology (hep-ph)0103 physical sciencesTensor010306 general physicsMinimal couplingPhysicsInflation (cosmology)010308 nuclear & particles physicsFísicaInflatonlcsh:QC1-999High Energy Physics - PhenomenologyHigh Energy Physics - Theory (hep-th)Einstein field equationslcsh:PhysicsAstrophysics - Cosmology and Nongalactic Astrophysicsdescription
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-09-01 |