Cosmological dynamics of 'exponential gravity'

M Abdelwahab, S Carloni… - Classical and Quantum …, 2008 - iopscience.iop.org
M Abdelwahab, S Carloni, PKS Dunsby
Classical and Quantum Gravity, 2008iopscience.iop.org
We present a detailed investigation of the cosmological dynamics based on exp (− R/Λ)
gravity. We apply the dynamical system approach to both the vacuum and matter cases and
obtain exact solutions and their stability in the finite and asymptotic regimes. The results
show that cosmic histories exist which admit a double de Sitter phase which could be useful
for describing the early-and the late-time accelerating universe.
Abstract
We present a detailed investigation of the cosmological dynamics based on exp (− R/Λ) gravity. We apply the dynamical system approach to both the vacuum and matter cases and obtain exact solutions and their stability in the finite and asymptotic regimes. The results show that cosmic histories exist which admit a double de Sitter phase which could be useful for describing the early-and the late-time accelerating universe.
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