Compatibility between the scalar field models of tachyon, k-essence and quintessence in f(R, T) gravity

Bhardwaj, Vinod Kumar; Pradhan, Anirudh; Dixit, Archana

doi:10.1016/j.newast.2020.101478

Cited by 19 publications

(9 citation statements)

References 158 publications

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“…• In previous work the authors [68] assumed the deceleration parameter as: q = − Ḣ+H 2 Hence, the results obtained in the present paper is more general than the previous one [68].…”

Section: Discussionmentioning

confidence: 52%

“…• In previous work the authors [68] have taken the ratio between H 2 and Λ, i.e.Λ = ξH 2 , where ξ is a constant. But in the present paper we have considered the dynamic cosmological term Λ(t) as a simple linear combination of ρ and a…”

Section: Discussionmentioning

confidence: 99%

“…In derived model, we assume the values of EoS parameter as ω = −1/3 and −2/3. Now, the behaviour of kinetic energy and scalar potential against z are demonstrated through the plots for three sets of observational data by employing a = a 0 (1 + z) −1 , here we assume a 0 = 1 as considered by distinct authors [68,87].…”

Section: The F(r T) De Models With Correspondence Of Scalar Fieldsmentioning

confidence: 99%

“…We have revisited in the recent work [68] by considering a distinct value of the cosmological term Λ as a simple linear combination of energy density ρ and scalr factor a and obtained a new and better scenario for different dark energy. The scalar field DE models can effectively clarify the basic DE theory, the application of scalar field DE models become very exciting to describe the energy density as influential theory.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of cosmological models in $f(R, T)$ gravity in different dark energy scenario

Bhardwaj,

Pradhan

2021

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In present paper, we search the existence of dark energy scalar field models within in f (R, T ) gravity theory established by Harko et al. (Phys. Rev. D 84, 024020, 2011) in a flat FRW universe. The correspondence between scalar field models have been examined by employing new generalized dynamical cosmological term Λ(t). In this regards, the best fit observational values of parameters from three distinct sets data are applied. To decide the solution to field equations, a scale factor a = (sinh(βt)) 1/n has been considered, where β & n are constants. Here, we employ the recent ensues (H 0 = 69.2 and q 0 = −0.52) from (OHD+JLA) observation (Yu et al., Astrophys. J. 856, 3, 2018). Through the numerical estimation and graphical assessing of various cosmological parameters, it has been experienced that findings are comparable with kinematics and physical properties of universe and compatible with recent cosmological ensues. The dynamics and potentials of scalar fields are clarified in FRW scenario in the present model. Potentials reconstruction is highly reasonable and shows a periodic establishment and in agreement with latest observations.

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“…• In previous work the authors [68] assumed the deceleration parameter as: q = − Ḣ+H 2 Hence, the results obtained in the present paper is more general than the previous one [68].…”

Section: Discussionmentioning

confidence: 52%

Section: Discussionmentioning

confidence: 99%

Section: The F(r T) De Models With Correspondence Of Scalar Fieldsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Evaluation of cosmological models in $f(R, T)$ gravity in different dark energy scenario

Bhardwaj,

Pradhan

2021

Preprint

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“…between α and β, by using t 0 = 13.8Gry q 0 = −0.73, we get the corresponding value of β [58,59] [See Table -1]. From this table, we observe that α increases with the increase of β.…”

Section: Solutions and Physical Behaviour Of The Modelmentioning

confidence: 98%

A new class of holographic dark energy models in LRS Bianchi Type-I

Pradhan,

Bhardwaj,

Dixit

et al. 2022

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In this paper, we examine the (LRS) Bianchi-type-I cosmological model with holographic dark energy. The exact solutions to the corresponding field equations are obtained by using generalized hybrid expansion law (HEL). The EoS parameter ω for DE is found to be time dependent and redshift dependent and its exiting range for derived model is agreeing well with the current observations. Here we likewise apply two mathematical diagnostics, the statefinder (r, s) and ω d − ω ′ d plane to segregate HDE model from the ΛCDM model. Here the ω d − ω ′ d diagnostic trajectories is the good tool to classifying the dynamical DE model. We found that our model lies in both thawing region and freezing region. We have also construct the potential as well as dynamics of the quintessence and tachyon scalar field. Some physical and geometric properties of this model along with the physical acceptability of cosmological solution have been discussed in detail.

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