A consistency relation for power law inflation in DBI models

2007/03/31 by Michał Spaliński, Michal Spalinski · 1 citation
Mathematics · Physics and Astronomy · #Black Holes and Theoretical Physics #Consistency (knowledge bases) #Cosmology and Gravitation Theories #Geometry #Inflation (cosmology) #Mathematics #Nonlinear system #Particle physics theoretical and experimental studies #Physics #Power law #Quantum mechanics #Realization (probability) #Scalar (mathematics) #Statistical physics #Statistics #String theory #Tensor (intrinsic definition) #Theoretical physics #hep-th

paper · pdf · doi:10.1016/j.physletb.2007.05.041

published as Phys.Lett.B650:313-316,2007 · Added references, a couple of comments, fixed 3 typos

openalex publication_date 2007/05/26 · arxiv created 2007/06/15 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

Brane inflation in string theory leads to a new realization of power law inflation which can give rise to significant non-gaussianity. This can happen for any throat geometry if the scalar potential is appropriate. This Letter presents a consistency relation connecting the running of the nonlinearity parameter characterizing the non-gaussianity and the scalar and tensor indices. The relationship is valid assuming that the throat geometry and scalar potential support power law inflation, regardless of the level of non-gaussianity.

Citations

• Inflation with large gravitational waves
• Cosmological rescaling through warped space
• Graceful exit from a stringy landscape via MSSM inflation
• Observing brane inflation
• M-theory inflation from multi M5-brane dynamics
• Non-Gaussian features of primordial fluctuations in single field inflationary models
• Enhancing the tensor-to-scalar ratio in simple inflation
• Towards inflation in string theory
• On non-Gaussianities in single-field inflation
• IR inflation from multiple branes
• Observational signatures and non-Gaussianities of general single-field inflation
• N-flation
• Brane inflation

Cited by

• Inflationary predictions in scalar-tensor DBI inflation