Zobrazeno 1 - 10
of 60
pro vyhledávání: '"Gadbail, Gaurav N."'
The accelerated expansion of the universe has been widely confirmed, posing challenges to the standard $\Lambda$CDM model, particularly the cosmological coincidence problem. This has motivated the exploration of modified gravity theories, including n
Externí odkaz:
http://arxiv.org/abs/2411.00051
In this work, we explore the behavior of interacting dark energy and dark matter within a model of $f(Q)$ gravity, employing a standard framework of dynamical system analysis. We consider the power-law $f(Q)$ model incorporating with two different fo
Externí odkaz:
http://arxiv.org/abs/2406.02026
Autor:
Gadbail, Gaurav N., Sahoo, P. K.
Publikováno v:
Chinese Journal of Physics 89 (2024) 1754-1762
In this work, we consider three different $f(Q)$ models, such as power-law, exponential, and logarithmic, to study which model better mimics $\Lambda$CDM evolution theoretically. Henceforth, we determine solutions to the $f(Q)$ gravity field equation
Externí odkaz:
http://arxiv.org/abs/2405.01594
Publikováno v:
Astrophysical Journal (ApJ) 972(2) (2024) 172
The increase of discrepancy in the standard procedure to choose the arbitrary functional form of the Lagrangian $f(Q)$ motivates us to solve this issue in modified theories of gravity. In this regard, we investigate the Gaussian process (GP), which a
Externí odkaz:
http://arxiv.org/abs/2404.13095
Publikováno v:
Eur. Phys. J. C 84(7), (2024) 752
We study the bounce cosmology to construct a singularity-free $f(\mathcal{R})$ model using the reconstruction technique. The formulation of the $f(\mathcal{R})$ model is based on the Raychaudhari equation, a key element employed in reconstructed mode
Externí odkaz:
http://arxiv.org/abs/2402.04813
Publikováno v:
Eur. Phys. J. C 83,1099 (2023)
Symmetric Teleparallel Gravity allows for the reformulation of gravity in the form of nonmetricity by vanishing the contorsion term in the generic affine connection. Our focus is on investigating a recently proposed extension of this theory in which
Externí odkaz:
http://arxiv.org/abs/2312.02492
Publikováno v:
Nuclear Physics B 1009 (2024) 116727
We study the $f(Q,T)$ gravity in the framework of Weyl geometry (known as Weyl-type $f(Q,T)$ gravity), where $Q$ denotes the non-metricity scalar, and $T$ denotes the energy-momentum tensor trace. In this work, we consider the $f(Q,T)$ model, which i
Externí odkaz:
http://arxiv.org/abs/2305.11190
Publikováno v:
Eur. Phys. J. C 83, 595 (2023)
Symmetric teleparallel gravity offers to reformulate the gravitational formalism without the presence of curvature and torsion with the help of non-metricity tensors. Interestingly, Symmetric teleparallel gravity can be formulated equivalently to tel
Externí odkaz:
http://arxiv.org/abs/2304.10245
Publikováno v:
Annals of Physics, 451 (2023) 169269
We use the hybrid model of bulk viscosity and generalized chaplygin gas (GCG), named the viscous generalized chaplygin gas (VGCG) model, which is thought to be an alternate dark fluid of the universe. We explore the dynamics of the VGCG model in the
Externí odkaz:
http://arxiv.org/abs/2303.01541
Publikováno v:
Annals of Physics, 451 (2023) 169244
The equation of state parameter is a significant method for characterizing dark energy models. We investigate the evolution of the equation of state parameter with redshift using a Bayesian analysis of recent observational datasets (the Cosmic Chrono
Externí odkaz:
http://arxiv.org/abs/2302.05070