Interacting dark sector: A dynamical system perspective
Issued Date
2025-05-15
Resource Type
ISSN
24700010
eISSN
24700029
Scopus ID
2-s2.0-105004179721
Journal Title
Physical Review D
Volume
111
Issue
10
Rights Holder(s)
SCOPUS
Bibliographic Citation
Physical Review D Vol.111 No.10 (2025)
Suggested Citation
Kritpetch C., Roy N., Banerjee N. Interacting dark sector: A dynamical system perspective. Physical Review D Vol.111 No.10 (2025). doi:10.1103/PhysRevD.111.103501 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/110036
Title
Interacting dark sector: A dynamical system perspective
Author(s)
Corresponding Author(s)
Other Contributor(s)
Abstract
We investigate the interaction between the dark sectors from the point of view of a dynamical system analysis. A general setup for interacting dark energy models that incorporates both quintessence and phantom fields through a switch parameter, allowing an interaction in the dark sectors, has been considered. In the first part of our analysis, we have not assumed any specific form of the interaction, and in the second part, we invoked examples in a general framework of the interaction. The potentials of the scalar field are classified into two broad classes of potentials: exponential and nonexponential. We identify the potential late-time attractors of the system, which have a complete dark energy domination. From our analysis, it is evident there could be an interaction between the dark sector. The interaction, if any, weakens over time. We find for the quintessence field the transfer of energy from dark matter to dark energy can flip the direction, and on the contrary, for the phantom field, it is only from dark matter to dark energy.