Interacting ω (q) dark energy model with phase space analysis
Yerzhanov K. Myrzakul S. Kenzhalin D. Khurshudyan M.
10 October 2021World Scientific
Modern Physics Letters A
2021#36Issue 31
The phase space analysis has been used to probe the accelerated expansion of the Universe when ω(q) dark energy interacts with cold dark matter. Non-gravitational interactions Q = 3Hbqρde and Q = 3Hbqρdm considered in this work are one of the first models of sign changing interactions that appeared in the literature. Specific ω(q) = ω0 + ω1q dark energy model with Pde = ω(q)ρde has been assumed and all late time scaling attractors have been found. This is a two-parameter model with ω0 and ω1 parameters to be determined, while q is the deceleration parameter. In general the motivation to consider similar fluid models is directly related to the attempts to unify dark energy and dark matter involving the properties of the deceleration parameter. The previous study using similar dark energy model showed that the BOSS result for the expansion rate at z = 2.34 can be explained without interaction with cold dark matter. In this way, the previous result provides a reasonable basis to organize future studies in this direction. This study is one of the first attempts in this direction. It should be mentioned that the full comparison of the models with observation data and the classification of future singularities have been left as a subject of a forthcoming paper. There are several ways that the model can be extended which also has been left as a subject of a forthcoming paper.
Accelerated expansion , Dark energy
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Ratbay Myrzakulov Eurasian International Centre for Theoretical Physics, Kazakhstan, Nur-Sultan, 010009, Kazakhstan
Eurasian National University, Kazakhstan, Nur-Sultan, 010008, Kazakhstan
Consejo Superior de Investigaciones Científicas, ICE/CSIC-IEEC, Campus UAB, Carrer de Can Magrans s/n, Bellaterra (Barcelona), 08193, Spain
International Laboratory for Theoretical Cosmology, Tomsk State University of Control Systems and Radioelectronics (TUSUR), Tomsk, 634050, Russian Federation
Institute of Physics, University of Silesia, Katowice, Poland
Ratbay Myrzakulov Eurasian International Centre for Theoretical Physics
Eurasian National University
Consejo Superior de Investigaciones Científicas
International Laboratory for Theoretical Cosmology
Institute of Physics
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