Initial conditions for brane inflation

2003/02/28 by Robert Brandenberger, R. Brandenberger, Ghazal Geshnizjani +2 · 4 citations
Mathematics · Physics and Astronomy · #Black Holes and Theoretical Physics #Brane #Brane cosmology #Classical mechanics #Cosmology and Gravitation Theories #Economics #Field (mathematics) #Galaxies: Formation, Evolution, Phenomena #Inflation (cosmology) #Inflaton #Mathematics #Momentum (technical analysis) #Phase space #Physics #Quantum mechanics #String (physics) #String theory #Theoretical physics #astro-ph #gr-qc #hep-ph #hep-th

paper · pdf · doi:10.1103/physrevd.67.123510

published as Phys.Rev. D67 (2003) 123510 · 11 pages, 2 figures

arxiv created 2003/03/05 · openalex publication_date 2003/06/17 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

String theory gives rise to various mechanisms to generate primordial inflation, of which ``brane inflation'' is one of the most widely considered. In this scenario, inflation takes place while two branes are approaching each other, and the modulus field representing the separation between the branes plays the role of the inflaton field. We study the phase space of initial conditions which can lead to a sufficiently long period of cosmological inflation, and find that taking into account the possibility of nonvanishing initial momentum can significantly change the degree of fine-tuning of the required initial conditions.

Citations

• Do we live inside a domain wall?
• First Estimations of Cosmological Parameters From BOOMERANG
• A new inflationary universe scenario: A possible solution of the horizon, flatness, homogeneity, isotropy and primordial monopole problems
• Cosmology for Grand Unified Theories with Radiatively Induced Symmetry Breaking
• Hybrid inflation in intersecting brane worlds
• Recombination of Intersecting D-Branes and Cosmological Inflation
• Branes and inflationary cosmology
• An Alternative to Compactification
• The Hierarchy Problem and New Dimensions at a Millimeter
• A flat Universe from high-resolution maps of the cosmic microwave background radiation
• Radiative Corrections as the Origin of Spontaneous Symmetry Breaking
• Brane inflation
• Chaotic inflation

Cited by

• D-brane dynamics and creations of open and closed strings after recombination
• Inflation with multiple sound speeds: A model of multiple DBI type actions and non-Gaussianities
• High-energy theory for close Randall-Sundrum branes
• Conceptual Problems of Inflationary Cosmology and a New Approach to Cosmological Structure Formation