Modified Chaplygin gas and solvable F-essence cosmologies

Jamil, Mubasher; Myrzakulov, Yerlan; Razina, Olga; Myrzakulov, Ratbay

doi:10.1007/s10509-011-0870-z

Cited by 42 publications

(22 citation statements)

References 53 publications

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“…Also it is important to study the relationship F (T ) gravity with k-essence, f-essence and g-essence (see e.g. [46], [50] and [80] - [85]). Finally we would like to note that one of interesting classes of F (T ) gravity is integrable models.…”

Section: Resultsmentioning

confidence: 99%

Accelerating universe from F(T) gravity

2011

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Section: Resultsmentioning

confidence: 99%

Accelerating universe from F(T) gravity

2011

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“…where b, η and Γ are the coupling parameters of the respective interaction models. It is worth mentioning that due to its simplicity the most widely used interaction model is the b-model and is available widely in literature [41,42,43,44].…”

Section: Basic Equations Of F(g) Gravitymentioning

confidence: 99%

Towards a possible solution for the coincidence problem: f(G) gravity as background

Rudra

2015

Int. J. Mod. Phys. D

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In this article we address the well-known cosmic coincidence problem in the framework of the f(G) gravity. In order to achieve this, an interaction between dark energy and dark matter is considered. A set-up is designed and a constraint equation is obtained which generates the f(G) models that do not suffer from the coincidence problem. Due to the absence of a universally accepted interaction term introduced by a fundamental theory, the study is conducted over three different forms of logically chosen interaction terms. To illustrate the set-up three widely known models of f(G) gravity are taken into consideration and the problem is studied under the designed set-up. The study reveals that the popular f (G) gravity models does not approve of a satisfactory solution of the long standing coincidence problem, thus proving to be a major setback for them as successful models of universe. Finally, two non-conventional models of f(G) gravity have been proposed and studied in the framework of the designed set-up. It is seen that a complete solution of the coincidence problem is achieved for these models. The study also reveals that the b-interaction term is much more preferable compared to the other interactions, due to its greater compliance with the recent observational data.

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“…where b, η and Γ are the coupling parameters of the respective interaction models. It is worth mentioning that due to its simplicity as well as viability, the most widely used interaction model is the b-model and is available widely in literature [44,45,46,47].…”

Section: Basic Equations Of F(rt) Gravitymentioning

confidence: 99%

Does f(R,T) gravity admit a stationary scenario between dark energy and dark matter in its framework?

Rudra

2015

Eur. Phys. J. Plus

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In this note we address the well-known cosmic coincidence problem in the framework of the f(R,T) gravity. In order to achieve this, an interaction between dark energy and dark matter is considered. A constraint equation is obtained which filters the f(R,T) models that produce a stationary scenario between dark energy and dark matter. Due to the absence of a universally accepted interaction term introduced by a fundamental theory, the study is conducted over three different forms of chosen interaction terms. As an illustration three widely known models of f(R,T) gravity are taken into consideration and used in the setup designed to study the problem. The study reveals that, the realization of the coincidence scenario is almost impossible for the popular models of f (R, T ) gravity, thus proving to be a major setback for these models.

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Modified Chaplygin gas and solvable F-essence cosmologies

Cited by 42 publications

References 53 publications

Accelerating universe from F(T) gravity

Accelerating universe from F(T) gravity

Towards a possible solution for the coincidence problem: f(G) gravity as background

Does f(R,T) gravity admit a stationary scenario between dark energy and dark matter in its framework?

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