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2016

Anisotropic inflation in Gauss-Bonnet gravity

Lahiri, Sayantani

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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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