Towards multi-field D-brane inflation in a warped throat

Journal Article · Mon Nov 01 00:00:00 EDT 2010 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2010/11/034· OSTI ID:22275465

Chen, Heng-Yu ^[1]; Gong, Jinn-Ouk ^[2]; Koyama, Kazuya ^[3]; Tasinato, Gianmassimo ^[4]

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1. Department of Physics, University of Wisconsin-Madison, 1150 University Avenue, Madison, WI53706-1390 (United States)
2. Instituut-Lorentz for Theoretical Physics, Universiteit Leiden, Niels Bohrweg 2, 2333 CA Leiden (Netherlands)
3. Institute of Cosmology and Gravitation, University of Portsmouth, Dennis Sciama Building, Burnaby Road, Portsmouth PO1 3FX (United Kingdom)
4. Institut für Theoretische Physik, Universität Heidelberg, Philosophenweg 19, 69120, Heidelberg (Germany)

We study the inflationary dynamics in a model of slow-roll inflation in warped throat. Inflation is realized by the motion of a D-brane along the radial direction of the throat, and at later stages instabilities develop in the angular directions. We closely investigate both the single field potential relevant for the slow-roll phase, and the full multi-field one including the angular modes which becomes important at later stages. We study the main features of the instability process, discussing its possible consequences and identifying the vacua towards which the angular modes are driven.

• OSTI ID: 22275465
• Journal Information: Journal of Cosmology and Astroparticle Physics, Vol. 2010, Issue 11; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
BRANES
COSMOLOGY
INFLATIONARY UNIVERSE
INFLATONS
INSTABILITY
POTENTIALS
VACUUM STATES