Title

Anisotropic Inflation and the Origin of Four Large Dimensions

Author(s)/Creator(s)

Christian Armendariz-Picon, Department of Physics, Syracuse University, Syracuse, NYFollow
Vikram Duvvuri, University of Chicago

Document Type

Article

Date

8-20-2003

Language

English

Disciplines

Physics

Description/Abstract

In the context of (4+d)-dimensional general relativity, we propose an inflationary scenario wherein 3 spatial dimensions grow large, while d extra dimensions remain small. Our model requires that a self-interacting d-form acquire a vacuum expectation value along the extra dimensions. This causes 3 spatial dimensions to inflate, whilst keeping the size of the extra dimensions nearly constant. We do not require an additional stabilization mechanism for the radion, as stable solutions exist for flat, and for negatively curved compact extra dimensions. From a four-dimensional perspective, the radion does not couple to the inflaton; and, the small amplitude of the CMB temperature anisotropies arises from an exponential suppression of fluctuations, due to the higher-dimensional origin of the inflaton. The mechanism triggering the end of inflation is responsible, both, for heating the universe, and for avoiding violations of the equivalence principle due to coupling between the radion and matter.

Additional Information

24 pages, 2 figures; uses RevTeX4. v2: Minor changes and added references. v3: Improved discussion of slow-roll More information at http://arxiv.org/abs/hep-th/0305237

Recommended Citation

Armendariz-Picon, Christian and Duvvuri, Vikram, "Anisotropic Inflation and the Origin of Four Large Dimensions" (2003). Physics - All Scholarship. 219.
https://surface.syr.edu/phy/219

Source

Harvested from Arxiv.org