A dynamical system analysis of cosmic evolution with coupled phantom dark energy with dark matter - INSPIRE

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A dynamical system analysis of cosmic evolution with coupled phantom dark energy with dark matter

Nov 18, 2020

32 pages

Published in:

Int.J.Mod.Phys.D 31 (2022) 01, 2150129

Published: Nov 10, 2021

e-Print:

2011.09842 [gr-qc]

DOI:

10.1142/S0218271821501297

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Abstract: (WSP)

This work is an example of the application of the dynamical system analysis in the context of cosmology. Here cosmic evolution is considered in the background of homogeneous and isotropic flat FLRW spacetime with interacting dark energy and varying mass dark matter as the matter content. The DE is chosen as phantom scalar field with self-interacting potential while the DM is in the form of dust. The potential of the scalar field and the mass function of dark matter are chosen as exponential or power-law form or in their product form. Using suitable dimensionless variables, the Einstein field equations and the conservation equations constitute an autonomous system. The stability of the nonhyperbolic critical points is analyzed by using center manifold theory. Finally, cosmological phase transitions have been detected through bifurcation analysis which has been done by Poincaré index theory.

Phantom dark energy model
critical point
stability
center manifold theory
bifurcation
98.80.Cq
98.80.-k
95.35.+d
95.36.+x
05.70.Fh

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Figures(29)

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