A microscopic limit on gravitational waves from D-brane inflation
Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D, Particles, fields, gravitation, and cosmology2007Vol. 75(12)
Citations Over TimeTop 1% of 2007 papers
Abstract
We derive a microscopic bound on the maximal field variation of the inflaton during warped D-brane inflation. By a result of Lyth, this implies an upper limit on the amount of gravitational waves produced during inflation. We show that a detection at the level $r>0.01$ would falsify slow roll D-brane inflation. In DBI (Dirac-Born-Infeld) inflation, detectable tensors may be possible in special compactifications, provided that $r$ decreases rapidly during inflation. We also show that for the special case of DBI inflation with a quadratic potential, current observational constraints imply strong upper bounds on the five-form flux.
Related Papers
- → Brane-world inflation without inflaton on the brane(2001)100 cited
- → Brane inflation: Swampland criteria, TCC, and reheating predictions(2022)9 cited
- → Modification to the power spectrum in the brane world inflation driven by the bulk inflaton(2003)3 cited
- → Brane inflation: swampland criteria, TCC, and reheating predictions(2020)1 cited
- → Inflation with bulk fields in the Randall-Sundrum warped compactification?(2001)