2016/05/31 by Hanif Golchin, Sara Jamali, Esmaeil Ebrahimi
Physics and Astronomy · #Astrophysics #Context (archaeology) #Cosmology #Cosmology and Gravitation Theories #Dark energy #Dark fluid #Dark matter #Galaxies: Formation, Evolution, Phenomena #Hot dark matter #Lambda-CDM model #Physics #Scalar field dark matter #Solar and Space Plasma Dynamics #gr-qc #hep-th
paper · pdf · doi:10.1142/s0218271817500985
24 pages, 6 figures, accepted in IJMPD
arxiv created 2017/02/18 · openalex publication_date 2017/03/13 · arxiv updated 2017/07/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We investigate the impacts of interaction between dark matter (DM) and dark energy (DE) in the context of two DE models, holographic (HDE) and ghost dark energy (GDE). In fact, using the dynamical system analysis, we obtain the cosmological consequence of several interactions, considering all relevant component of universe, i.e. matter (dark and luminous), radiation and DE. Studying the phase space for all interactions in detail, we show the existence of unstable matter-dominated and stable DE-dominated phases. We also show that linear interactions suffer from the absence of standard radiation-dominated epoch. Interestingly, this failure resolved by adding the nonlinear interactions to the models. We find an upper bound for the value of the coupling constant of the interaction between DM and DE as [Formula: see text][Formula: see text]in the case of holographic model, and [Formula: see text] in the case of GDE model, to result in a cosmological viable matter-dominated epoch. More specifically, this bound is vital to satisfy instability and deceleration of matter-dominated epoch.