Holographic dark energy in Brans–Dicke theory

Xu, Lixin; Li, Wenbo; Lu, Jianbo

doi:10.1140/epjc/s10052-008-0858-1

Cited by 72 publications

(79 citation statements)

References 39 publications

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“…First, it should be stressed that recently in [26], the f (R, T ) theories have been interpreted as a generalization of the Brans-Dicke model [52][53][54][55][56]. As argued by the authors in [26], the extra terms in the f (R, T ) FEs may play the role of additional terms of effective gravitational and cosmological "constants" G eff and eff .…”

Section: Another Further Work May Rise From An Alternative Form For Fmentioning

confidence: 99%

A complete cosmological scenario from $$f(R,T^{\phi })$$ f ( R , T ϕ )

Moraes¹,

Santos²

2016

Eur. Phys. J. C

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Recent elaborated by Harko et al., the f (R, T ) theories of gravity allow one to contemplate an optimistic alternative to dark energy, for which R and T stand for the Ricci scalar and the trace of the energy-momentum tensor, respectively. Although the literature has shown that the T dependence on the gravitational part of the action -which is due to the consideration of quantum effects -may induce some novel features in the scope of late-time cosmological dynamics, in the radiation-dominated universe, when T = 0, no contributions seem to arise from such theories. Apparently, f (R, T ) contributions to a radiation-dominated universe may arise only from the f (R, T φ ) approach, which is nothing but the f (R, T ) gravity in the case of a selfinteracting scalar field whose trace of the energy-momentum tensor is T φ . We intend, in this article, to show how f (R, T φ ) theories of gravity can contribute to the study of the primordial stages of the universe. Our results predict a graceful exit from an inflationary stage to a radiation-dominated era. They also predict a late-time cosmic acceleration after a matter-dominated phase, enabling the f (R, T φ ) theories to describe, in a self-consistent way, all the different stages of the dynamics of the universe.

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Section: Another Further Work May Rise From An Alternative Form For Fmentioning

confidence: 99%

A complete cosmological scenario from $$f(R,T^{\phi })$$ f ( R , T ϕ )

Moraes¹,

Santos²

2016

Eur. Phys. J. C

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“…He also investigated three choices of L which are assumed to give an infrared cutoff. First, he assumed L = H −1 introducing the most natural choice for the infrared cutoff in the formalism of HDE, but this choice could not illustrate the accelerated expansion of the universe in General Relativity [10] and BD gravity [11]. As a Second cutoff, the particle horizon radius was selected, which also failed to explain the current cosmic behavior.…”

Section: Introductionmentioning

confidence: 99%

New Holographic Dark Energy Model in Brans-Dicke Theory

2018

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Abstract:We study the cosmic evolution of the Bianchi type I universe by using new holographic dark energy model in the context of the Brans-Dicke theory for both non-interacting and interacting cases between dark energy and dark matter. We evaluate the equation of state for dark energy ω D and draw the ω D −ω D plane, where the dot denotes the time derivative. It is found that a stage in which the cosmic expansion is accelerating can be realized in both cases. In addition, we investigate the stability of the model by analyzing the sound speed. As a result, it is demonstrated that for both cases, the behavior of the sound speed becomes unstable. Furthermore, with the Om-diagnostic tool, it is shown that the quintessence region of the universe can exist.

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“…In Brans-Dicke theory, the gravitational "constant" G is replaced with the inverse of a time-dependent scalar field Φ(t), which couples to gravity with a coupling parameter ω. The holographic dark energy model in the framework of Brans-Dicke theory has already been considered by many people [46][47][48][49][50]. Here we study some characters of time variable cosmological constant in BD theory.…”

Section: Introductionmentioning

confidence: 99%

Time Variable Cosmological Constant of Holographic Origin With Interaction in Brans–dicke Theory

Liu

et al. 2012

Int. J. Mod. Phys. D

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Time variable cosmological constant (TVCC) of holographic origin with interaction in BransDicke theory is discussed in this paper. We investigate some characters for this model, and show the evolutions of deceleration parameter and equation of state (EOS) for dark energy. It is shown that in this scenario an accelerating universe can be obtained and the evolution of EOS for dark energy can cross over the boundary of phantom divide. In addition, a geometrical diagnostic method, jerk parameter is applied to this model to distinguish it with cosmological constant.

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Holographic dark energy in Brans–Dicke theory

Cited by 72 publications

References 39 publications

A complete cosmological scenario from $$f(R,T^{\phi })$$ f ( R , T ϕ )

A complete cosmological scenario from $$f(R,T^{\phi })$$ f ( R , T ϕ )

New Holographic Dark Energy Model in Brans-Dicke Theory

Time Variable Cosmological Constant of Holographic Origin With Interaction in Brans–dicke Theory

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