A microscopic limit on gravitational waves from D-brane inflation

Journal Article · Fri Jun 15 00:00:00 EDT 2007 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.75.123508· OSTI ID:20935298

Baumann, Daniel; McAllister, Liam ^[1]

---

1. Department of Physics, Princeton University, Princeton, New Jersey 08544 (United States)

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.

• OSTI ID: 20935298
• Journal Information: Physical Review. D, Particles Fields, Vol. 75, Issue 12; Other Information: DOI: 10.1103/PhysRevD.75.123508; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BORN-INFELD THEORY
COMPACTIFICATION
D-BRANES
GRAVITATIONAL WAVES
INFLATIONARY UNIVERSE
POTENTIALS
TENSORS