On the Initial Conditions for Brane Inflation

Details On the Initial Conditions for Brane Inflation On the Initial Conditions for Brane Inflation

2003-02-27

arxiv.org/abs/hep-th/0302222v2

Phys.Rev. D67 (2003) 123510

Physics

High Energy Physics

High Energy Physics - Theory

11 pages, 2 figures

Scientific paper

10.1103/PhysRevD.67.123510

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.

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