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arXiv · 1605.09247

Anisotropic inflation in Gauss-Bonnet gravity

Sayantani Lahiri
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Abstract

We study anisotropic inflation with Gauss-Bonnet correction in presence of a massless vector field. In this scenario, exact anisotropic power-law inflation is realized when the inflaton potential, gauge coupling function and the Gauss-Bonnet coupling are exponential functions. We show that anisotropy becomes proportional to two slow-roll parameters of the theory and hence gets enhanced in presence of quadratic curvature corrections. The stability analysis reveals that anisotropic power-law solutions remain stable over a substantially large parameter region.

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Sayantani Lahiri. 2016-10-04. Anisotropic inflation in Gauss-Bonnet gravity. https://doi.org/10.1088/1475-7516%2F2016%2F09%2F025

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