Bouncing Cosmology in Extended Gravity and Its Reconstruction as Dark Energy Model

Agrawal, Aniket; Tello‐Ortiz, Francisco; Mishra, B.; Tripathy, S. K.

doi:10.1002/prop.202100065

Cited by 19 publications

(12 citation statements)

References 64 publications

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“…Moreover, the bounce cosmology with an appearance of a Type-IV finite-time future singularity has been discussed in a ghost free Gauss-Bonnet gravity [56]. In addition, more kinds of theoretical aspects in bouncing cosmology have been studied [57][58][59][60][61][62].…”

Section: Introductionmentioning

confidence: 99%

Bouncing cosmology in modified gravity with higher-order curvature terms

Singh

Balhara

Bamba

et al. 2023

J. High Energ. Phys.

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A bouncing scenario of a flat homogeneous and isotropic universe is explored by using the reconstruction technique for the power-law parametrization of the Hubble parameter in a modified gravity theory with higher-order curvature and trace of the energy-momentum tensor terms. It is demonstrated that bouncing criteria are satisfied so that the cosmological initial singularity can be avoided. In addition, it is shown that the equation of state parameter crosses the line of the phantom divide. In the present scenario, the universe is filled with perfect fluid around the bouncing point, in which the universe becomes highly unstable and a big bounce can be realized. Furthermore, it is found that extremal acceleration occurs at the bouncing point.

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Section: Introductionmentioning

confidence: 99%

Bouncing cosmology in modified gravity with higher-order curvature terms

Singh

Balhara

Bamba

et al. 2023

J. High Energ. Phys.

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“…For this purpose, we consider a pressureless dust FRW background whose general solution may be H(t) = H b (t). Here we consider perturbations of the Hubble parameter and the energy density around the arbitrary solutions H b (t) as [36,70]…”

Section: Stability Analysismentioning

confidence: 99%

Cosmological model with time varying deceleration parameter in $F(R,G)$ gravity

Lohakare,

Tripathy,

Mishra

2021

Preprint

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In this paper, we study the dynamical behaviour of the Universe in the F (R, G) theory of gravity, where R and G respectively denote the Ricci scalar and Gauss-Bonnet invariant. Our wide analysis encompasses the energy conditions, cosmographic parameters, Om(z) diagnostic, stability and the viability of reconstructing the referred model through a scalar field formalism. The model obtained here shows the quintessence like behaviour at late times.

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“…In recent times, the bouncing scenario has been extensively studied in the curvature and torsion based modified gravity and in the scalar tensor models. [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Matter bounce scenario in extended symmetric teleparallel gravity

2023

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In this paper, we have shown the matter bounce scenario of the Universe in an extended symmetric teleparallel gravity, the f(Q) gravity. Motivated from the bouncing scenario and loop quantum cosmology (LQC), the form of the function f(Q) has been obtained at the backdrop of Friedmann–Lema$${\hat{i}}$$ i ^ tre–Robertson Walker (FLRW) space time. Considering the background cosmology dominated by dust fluid, the e-folding parameter has been expressed, which contains the nonmetricity term. Since the slow roll criterion in the bouncing context is not valid, we used a conformal equivalence between f(Q) and scalar-tensor model to apply the bottom-up reconstruction technique in the bouncing model. The dynamics of the model has been studied through the phase space analysis, where both the stable and unstable nodes are obtained. Also, the stability analysis has been performed with the first order scalar perturbation of the Hubble parameter and matter energy density to verify the stability of the model.

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Bouncing Cosmology in Extended Gravity and Its Reconstruction as Dark Energy Model

Cited by 19 publications

References 64 publications

Bouncing cosmology in modified gravity with higher-order curvature terms

Bouncing cosmology in modified gravity with higher-order curvature terms

Cosmological model with time varying deceleration parameter in $F(R,G)$ gravity

Matter bounce scenario in extended symmetric teleparallel gravity

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