Anisotropic inflation in Gauss-Bonnet gravity

Journal Article · Mon Sep 19 00:00:00 EDT 2016 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2016/09/025· OSTI ID:22572151

Lahiri, Sayantani ^[1]

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1. ZARM, University of Bremen,Am Falltrum, 28359 Bremen (Germany)

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.

• Sponsoring Organization: SCOAP3, CERN, Geneva (Switzerland)
• OSTI ID: 22572151
• Journal Information: Journal of Cosmology and Astroparticle Physics, Vol. 2016, Issue 09; Other Information: PUBLISHER-ID: JCAP09(2016)025; OAI: oai:repo.scoap3.org:17218; cc-by Article funded by SCOAP3. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 License. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANISOTROPY
COSMOLOGICAL INFLATION
GENERAL RELATIVITY THEORY
GRAVITATION
INFLATIONARY UNIVERSE
MATHEMATICAL SOLUTIONS
VECTOR FIELDS