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Origin of the universe: A hint from Eddington-inspired Born-Infeld gravity

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Abstract

We study the ‘initial state’ of an anisotropic universe in Eddington-inspired Born-Infeld gravity filled with a scalar field, whose potential has various forms. With this purpose, the evolution of a spatially-flat, homogeneous, anisotropic Kasner universe is studied. We find an exact evolution of the universe for each scalar potential by imposing a maximal pressure condition. The solution is shown to describe the initial state of the universe. The state is regular if the scalar potential does not increase faster than the quadratic power for large-field values. We also show that the anisotropy does not raise any defect in the early universe, contrary to the case of general relativity.

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Authors and Affiliations

  1. School of Liberal Arts and Sciences, Korea National University of Transportation, Chungju, 380-702, Korea

    Hyeong-Chan Kim

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  1. Hyeong-Chan Kim
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Correspondence to Hyeong-Chan Kim.

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Kim, HC. Origin of the universe: A hint from Eddington-inspired Born-Infeld gravity. Journal of the Korean Physical Society 65, 840–845 (2014). https://doi.org/10.3938/jkps.65.840

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  • DOI: https://doi.org/10.3938/jkps.65.840

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