Vector Field and Inflation

Details Vector Field and Inflation Vector Field and Inflation

2009-02-23

arxiv.org/abs/0902.3904v1

Physics

High Energy Physics

High Energy Physics - Theory

1+7pages, 3figures, To appear in the Proceedings of the CospA 2008, Korea

Scientific paper

We have investigated if the vector field can give rise to an accelerating phase in the early universe. We consider a timelike vector field with a general quadratic kinetic term in order to preserve an isotropic background spacetime. The vector field potential is required to satisfy the three minimal conditions for successful inflation: i) $\rho>0$, ii) $\rho+3P < 0$ and iii) the slow-roll conditions. As an example, we consider the massive vector potential and small field type potential as like in scalar driven inflation.

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