Archana Dixit
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View article: Phantom Dark Energy Behavior in Weyl Type f(Q,T) Gravity Models with Observational Constraints
Phantom Dark Energy Behavior in Weyl Type f(Q,T) Gravity Models with Observational Constraints Open
This study explores the behavior of phantom dark energy within the framework of Weyl-type f(Q,T) gravity, considering a spatially flat FLRW universe under observational constraints. The field equations are analytically solved for a dust-li…
View article: An Oscillating Rastall Universe Crossing the Phantom Divide Line
An Oscillating Rastall Universe Crossing the Phantom Divide Line Open
A cyclic flat universe with Quintom behavior and a future Big Rip as presented in the framework of Rastall gravity, which is an extension of the standard $\Lambda$CDM model. The Hubble parameter oscillates periodically between positive and…
View article: Dark Energy and Cosmic Evolution: A Study in f (R, T) Gravity
Dark Energy and Cosmic Evolution: A Study in f (R, T) Gravity Open
In the context of f(R, T) gravity theory for the flat Friedmann Lemaitre Robertson Walker (FLRW) model, the accelerating expansion of the universe is investigated using a specific form of the emergent Hubble parameter. Datasets from H(z), …
View article: An oscillating Rastall universe crossing the phantom divide line
An oscillating Rastall universe crossing the phantom divide line Open
A cyclic flat universe with quintom behaviour and future big rip has been presented in the framework of Rastall gravity, which is an extension of the standard $Λ$CDM model. The Hubble parameter oscillates periodically between positive and …
View article: Properties of interacting quark star in light of Rastall gravity
Properties of interacting quark star in light of Rastall gravity Open
This study explores the properties of quark stars (QS) formulated with an interacting quark matter equation of state (EoS) within the framework of Rastall gravity, a modified theory of gravity. We derive the mass-radius relationships and c…
View article: Properties of interacting quark star in light of Rastall gravity
Properties of interacting quark star in light of Rastall gravity Open
This study explores the properties of quark stars (QSs) formulated with an interacting quark matter equation of state within the framework of Rastall gravity, a modified theory of gravity. We derive the mass-radius relationships and calcul…
View article: Exploring Phase Space Trajectories in $Λ$CDM Cosmology with f(G) Gravity Modifications
Exploring Phase Space Trajectories in $Λ$CDM Cosmology with f(G) Gravity Modifications Open
In this work, the cosmic solutions, particularly the well-known $Λ$CDM model, are investigated in the framework of the Gauss-Bonnet gravity, where the gravitational action incorporates the Gauss-Bonnet invariant function. We utilize a spec…
View article: A flat FLRW dark energy model in f(Q,C)-gravity theory with observational constraints
A flat FLRW dark energy model in f(Q,C)-gravity theory with observational constraints Open
In the recently suggested modified non-metricity gravity theory with boundary terms in a flat FLRWspacetime universe, dark energy scenarios of cosmological models are examined in this study. An arbitrary function, $f(Q, C)=Q+αC^{2}$, has b…
View article: Thermodynamics of the Acceleration of the Universe in the κ(R, T) Gravity Model
Thermodynamics of the Acceleration of the Universe in the κ(R, T) Gravity Model Open
In this article, we examined the behavior of dark energy (DE) and the cosmic acceleration in the framework of κ(R,T) gravity in the standard spherically symmetric coordinates (xi) = t,r,θ,ϕ, a spatially homogeneous and isotropic FLRW space…
View article: Transit string dark energy models in f(Q) gravity
Transit string dark energy models in f(Q) gravity Open
In this paper, we have investigated an anisotropic cosmological model in [Formula: see text] gravity with string fluid in LRS Bianchi type-I universe. We have considered the arbitrary function [Formula: see text], where [Formula: see text]…
View article: Quintessence Behavior of an Anisotropic Bulk Viscous Cosmological Model in Modified f(Q)-Gravity
Quintessence Behavior of an Anisotropic Bulk Viscous Cosmological Model in Modified f(Q)-Gravity Open
In this article, we consider an anisotropic viscous cosmological model having LRS Bianchi type I spacetime with f(Q) gravity. We investigate the modified f(Q) gravity with form f(Q)=αQ2+β, where Q is the non-metricity scalar and α, β are t…
View article: Bulk Viscous Flat FLRW Model with Observational Constraints in f(T, B) Gravity
Bulk Viscous Flat FLRW Model with Observational Constraints in f(T, B) Gravity Open
This paper investigates the impact of bulk viscosity within the framework of f(T,B) gravity. We consider a time-dependent viscosity model with a particular Hubble parameter expression. Here, we looked into the viability of well-motivated f…
View article: Quintessence Behaviour of an Anisotropic Bulk Viscous Cosmological Model in Modified $f(Q)$-Gravity
Quintessence Behaviour of an Anisotropic Bulk Viscous Cosmological Model in Modified $f(Q)$-Gravity Open
In this article, we have discussed the results of our investigation. We consider an anisotropic viscous cosmological model of (LRS) Bianchi type I spacetime universe filled with a viscous fluid under $f(Q)$ gravity. We have studied the mod…
View article: Rényi holographic dark energy models in teleparallel gravity
Rényi holographic dark energy models in teleparallel gravity Open
In this paper, we have investigated the physical behavior of cosmological models in the framework of modified teleparallel gravity. This model is established using a Rényi holographic dark energy (RHDE) model with a Hubble cut-off. Here, w…
View article: A new class of holographic dark energy models in LRS Bianchi Type-I
A new class of holographic dark energy models in LRS Bianchi Type-I Open
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 the generalized hybrid expansion law (HEL). The EoS parameter …
View article: Cosmological models of generalized ghost pilgrim dark energy (GGPDE) in the gravitation theory of Saez–Ballester
Cosmological models of generalized ghost pilgrim dark energy (GGPDE) in the gravitation theory of Saez–Ballester Open
In this paper, we study the mechanism of the cosmic model in the presence of generalized ghost pilgrim dark energy (GGPDE) and matter in locally rotationally symmetric (LRS) Bianchi type-I space-time by the utilization of new holographic D…
View article: The models of transit cosmology along with observational constriction in f(Q,T) gravity
The models of transit cosmology along with observational constriction in f(Q,T) gravity Open
Xu et al. (Eur. Phys. J. C 79 (2019) 708) have anticipated the theory of Gravity. The modified study of [Formula: see text] is elucidated here as Cosmological model. In it the action holds a role as a capricious arbitrary function [Formula…
View article: Model for Modified Holographic Ricci Dark Energy in Gravitation Theory of Branc Dicke
Model for Modified Holographic Ricci Dark Energy in Gravitation Theory of Branc Dicke Open
In this cosmological model, we have studied the spatially homogeneous and anisotropic Bianchi type and axially symmetric model filled with dark matter and dark energy in Brans-Dicke’s [1] theory of gravitation. Here, we consider the modifi…
View article: Transit cosmological models with observational constraints in f(Q, T) gravity
Transit cosmological models with observational constraints in f(Q, T) gravity Open
This cosmological model is a study of modified $f(Q,T)$ theory of gravity which was recently proposed by Xu {\it et al.} (Eur. Phys. J. C {\bf 79}, 708 (2019)). In this theory of gravity, the action contains an arbitrary function $f(Q,T)$ …