LRS Bianchi type-I cosmological model with constant deceleration parameter in f(R,T) gravity

Bishi, Binaya K.; Pacif, S. K. J.; Sahoo, P. K.; Singh, G. P.

doi:10.1142/s0219887817501584

Cited by 37 publications

(10 citation statements)

References 51 publications

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“…Bishi et al [51] have studied the anisotropic LRS Bianchi type-I model in f (R, T ) gravity with this special form of variation of Hubble parameter that yields constant q. It would be interesting to study the particle creation mechanism with constant q in the present model.…”

Section: Model IIImentioning

confidence: 96%

“…The recent scenario demands that one may examine the variation of cosmic acceleration, which may be better explained by considering varying time deceleration parameter instead of knowing only the initial phase of cosmic acceleration and the present value of the deceleration parameter. Cosmologists have investigated constant and time-dependent deceleration parameter in various cosmological set-ups [50][51][52][53]. Singh et al [27,54] have investigated the effect of particle production in the framework of higher derivative theory with linear EoS by considering constant deceleration parameter [27] and time-varying deceleration parameter [54].…”

Section: Introductionmentioning

confidence: 99%

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Study of Particle Creation with Quadratic Equation of State in Higher Derivative Theory

Singh

Lalke

Hulke³

2020

Braz J Phys

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We investigate the effect of particle creation in flat Friedmann-Lemaitre-Robertson-Walker (FLRW) spacetime under the higher derivative theory composition. The exact solution of the field equation in higher derivative theory is obtained by considering the quadratic equation of state, p = ωρ 2 − ρ and different forms of deceleration parameter. The physical acceptance and stability of the models are explored by discussing energy conditions and squared sound speed. In addition to that, the statefinder diagnostic pair {r, s} is also scrutinized to measure the deviation of considered models from cold dark matter (CDM) model.

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Section: Model IIImentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Study of Particle Creation with Quadratic Equation of State in Higher Derivative Theory

Singh

Lalke

Hulke³

2020

Braz J Phys

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“…This physical law is imposed on the basis of the observations of the velocity redshift relation for extragalactic sources which suggest that the Hubble expansion of the universe may achieve isotropy when σ θ is constant [68]. The condition was used in several occasions in the literature [66,69,70].…”

Section: Case Ii: ρ = Constant (γ )mentioning

confidence: 99%

Isotropization of locally rotationally symmetric Bianchi-I universe in f(Q)-gravity

Mandal

Beh

et al. 2022

Eur. Phys. J. C

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Despite having the somewhat successful description of accelerated cosmology, the early evolution of the universe always challenges mankind. Our promising approach lies in a new class of symmetric teleparallel theory of gravity named f(Q), where the non-metricity scalar Q is responsible for the gravitational interaction, which may resolve some of the issues. To study the early evolution of the universe, we presume an anisotropic locally rotationally symmetric (LRS) Bianchi-I spacetime and derive the motion equations. We discuss the profiles of energy density, equation of state and skewness parameter and observe that our models archive anisotropic spatial geometry in the early phase of the universe with a possible presence of anisotropic fluid and as time goes on, even in the presence of an anisotropic fluid, the universe could approach isotropy due to inflation and the anisotropy of the fluid fades away at the same time.

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“…This physical law is imposed on the basis of the observations of the velocity redshift relation for extragalactic sources which suggest that the Hubble expansion of the universe may achieve isotropy when σ θ is constant [64]. The condition was used in several occasions in the literature [62,65,66]. As earlier, we consider two distinct cases to close the system and compare them.…”

Section: Case Ii: ρ = Constant (γ)mentioning

confidence: 99%

Isotropization of locally rotationally symmetric Bianchi-I universe in $f(Q)$-gravity

De,

Mandal,

Beh

et al. 2022

Preprint

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Despite having the somewhat successful description of accelerated cosmology, the early evolution of the universe always challenges mankind. Our promising approach lies in a new class of symmetric teleparallel theory of gravity named f (Q), where the non-metricity scalar Q is responsible for the gravitational interaction, which may resolve some of the issues. To study the early evolution of the universe, we presume an anisotropic locally rotationally symmetric (LRS) Bianchi-I spacetime and derive the motion equations. We discuss the profiles of energy density, equation of state and skewness parameter and observe that our models archive anisotropic spatial geometry in the early phase of the universe with a possible presence of anisotropic fluid and as time goes on, even in the presence of an anisotropic fluid, the universe could approach isotropy due to inflation and the anisotropy of the fluid fades away at the same time.

show abstract

LRS Bianchi type-I cosmological model with constant deceleration parameter in f(R,T) gravity

Cited by 37 publications

References 51 publications

Study of Particle Creation with Quadratic Equation of State in Higher Derivative Theory

Study of Particle Creation with Quadratic Equation of State in Higher Derivative Theory

Isotropization of locally rotationally symmetric Bianchi-I universe in f(Q)-gravity

Isotropization of locally rotationally symmetric Bianchi-I universe in $f(Q)$-gravity

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