Vector Field and Inflation

Abstract

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.

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

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• Inflation driven by massive vector fields with derivative self-interactions
• Slow-roll inflation from massive vector fields non-minimally coupled to gravity
• The Unified First law in "Cosmic Triad" Vector Field Scenario
• Inflation with antisymmetric tensor field: new candidates
• Inflation using a triplet of Antisymmetric tensor fields