Dynamical analysis of Brans-Dicke universe with inverse power-law effective potential
- Authors
- Sim J.; Park J.; Lee T.H.
- Issue Date
- Apr-2020
- Publisher
- World Scientific Publishing Co. Pte Ltd
- Keywords
- dark energy; dynamical analysis; Modified gravity
- Citation
- Modern Physics Letters A, v.35, no.12
- Journal Title
- Modern Physics Letters A
- Volume
- 35
- Number
- 12
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/36222
- DOI
- 10.1142/S0217732320500947
- ISSN
- 0217-7323
- Abstract
- We study Brans-Dicke cosmology with an inverse power-law effective potential. By using dynamical analyses, we search for fixed points corresponding to the radiation-like matter and dark energy-dominated era of our Universe, and the stability of fixed points is also investigated. We find phase space trajectories which are attracted to the stable point of the dark energy-dominated era from unstable fixed points like matter-dominated era of the Universe. The dark energy comes from effective potentials of the Brans-Dicke field, whose variation (related to the time-variation of the gravitational coupling constant) is shown to be in good agreement with observational data. © 2020 World Scientific Publishing Company.
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Collections - College of Natural Sciences > Department of Physics > 1. Journal Articles
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