Abstract.
The correspondence of the Gauss-Bonnet (GB) model and its modified (MGB) model of dark energy with the standard and generalized Chaplygin gas-scalar field models (SCG and GCG) have been studied in a flat universe. The exact solution of potentials and scalar fields, which describe the accelerated expansion of the universe, are reconstructed. According to the evolutionary behavior of the GB and MGB models, the same form of dynamics of scalar field and potential for different SCG and GCG models are derived. By calculating the squared sound speed of the MGB, GB model as well as the SCG, GCG, and investigating the GB-Chaplygin gas from the viewpoint of linear perturbation theory, we find that the best results, which are consistent with the observation, may appear by considering MGB-GCG. Also, we find out some bounds for parameters.
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Khodam-Mohammadi, A., Karimkhani, E. & Alaei, A. Gauss-Bonnet dark energy Chaplygin gas model. Eur. Phys. J. Plus 131, 398 (2016). https://doi.org/10.1140/epjp/i2016-16398-5
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DOI: https://doi.org/10.1140/epjp/i2016-16398-5