Evolution of the Brans–Dicke Parameter in Generalized Chameleon Cosmology
Mubasher Jamil1*, D. Momeni2**
1Center for Advanced Mathematics and Physics (CAMP), National University of Sciences and Technology (NUST), H-12, Islamabad, Pakistan 2Department of Physics, Faculty of Sciences, Tarbiat Moallem University, Tehran, Iran
Evolution of the Brans–Dicke Parameter in Generalized Chameleon Cosmology
Mubasher Jamil1*, D. Momeni2**
1Center for Advanced Mathematics and Physics (CAMP), National University of Sciences and Technology (NUST), H-12, Islamabad, Pakistan 2Department of Physics, Faculty of Sciences, Tarbiat Moallem University, Tehran, Iran
摘要Motivated by an earlier study of Sahoo and Singh [Mod. Phys. Lett. A 17 (2002) 2409], we investigate the time dependence of the Brans–Dicke parameter ω(t) for an expanding Universe in the generalized Brans–Dicke Chameleon cosmology, and obtain an explicit dependence of ω(t) in different expansion phases of the Universe. Also, we discuss how the observed accelerated expansion of the observable Universe can be accommodated in the present formalism.
Abstract：Motivated by an earlier study of Sahoo and Singh [Mod. Phys. Lett. A 17 (2002) 2409], we investigate the time dependence of the Brans–Dicke parameter ω(t) for an expanding Universe in the generalized Brans–Dicke Chameleon cosmology, and obtain an explicit dependence of ω(t) in different expansion phases of the Universe. Also, we discuss how the observed accelerated expansion of the observable Universe can be accommodated in the present formalism.
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2011, Vol. 28 
