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arxiv: 1005.4574 · v3 · submitted 2010-05-25 · 🌌 astro-ph.CO · gr-qc· hep-th

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Cosmological evolution in exponential gravity

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classification 🌌 astro-ph.CO gr-qchep-th
keywords cosmologicalevolutionexponentialgravityphantomaccelerationconditionsconfirm
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We explore the cosmological evolution in the exponential gravity $f(R)=R +c_1 (1-e^{- c_2 R})$ ($c_{1, 2} = \mathrm{constant}$). We summarize various viability conditions and explicitly demonstrate that the late-time cosmic acceleration following the matter-dominated stage can be realized. We also study the equation of state for dark energy and confirm that the crossing of the phantom divide from the phantom phase to the non-phantom (quintessence) one can occur. Furthermore, we illustrate that the cosmological horizon entropy globally increases with time.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Modified Gravity Theories on a Nutshell: Inflation, Bounce and Late-time Evolution

    gr-qc 2017-05 accept novelty 2.0

    Modified gravity theories supply viable mathematical frameworks for inflation, bounces, and dark energy eras that match observational data.