76 citations · 470 across the 21 of their papers we have counts for
21 papers
Reconstruction of a dark energy model for the Dirac-Born-Infeld scalar field with the Hubble and DESI data via Gaussian process
Sayantan Ghosh, Gaurav N. Gadbail, P. K. Sahoo +1
In this study, we reconstruct the dark energy (DE) as a Dirac-Born-Infeld (DBI) scalar field from the Hubble dataset (32 CC + 26 BAO) and the DESI dataset using the Gaussian proces…
A sound-horizon-free measurement of the Hubble constant from DESI DR2 baryon acoustic oscillations using artificial neural networks
Gaurav N. Gadbail, Kazuharu Bamba
We present a model-independent, sound-horizon-free measurement of the Hubble constant using baryon acoustic oscillation tracers from the Dark Energy Spectroscopic Instrument…
A model-independent measurement of the Hubble constant from gravitational-wave standard sirens and electromagnetic observations
Gaurav N. Gadbail, Kazuharu Bamba
The Hubble tension is one of the most significant challenges in modern cosmology. Developing new approaches to estimate the Hubble constant is therefore crucial, and in this work,…
Accelerated Expansion of the Universe in Nonmetricity-based Modified Gravity
Gaurav N. Gadbail
This thesis explores the cosmological implications of modified gravity, focusing on nonmetricity-based gravity as an alternative to the CDM model in explaining cosmic acc…
Reconstruction of the scalar field potential in nonmetricity gravity through Gaussian processes
Gaurav N. Gadbail, Sanjay Mandal, P. K. Sahoo +1
The accelerated expansion of the universe has been widely confirmed, posing challenges to the standard CDM model, particularly the cosmological coincidence problem. This has mot…
Cosmological dynamics of interacting dark energy and dark matter in gravity
Gaurav N. Gadbail, Simran Arora, Phongpichit Channuie +1
In this work, we explore the behavior of interacting dark energy and dark matter within a model of gravity, employing a standard framework of dynamical system analysis. We c…
Modified gravity models and their cosmological consequences
Gaurav N. Gadbail, P. K. Sahoo
In this work, we consider three different models, such as power-law, exponential, and logarithmic, to study which model better mimics CDM evolution theoretically. Hencefo…
Gaussian Process Approach for Model-Independent Reconstruction of Gravity with Direct Hubble Measurements
Gaurav N. Gadbail, Sanjay Mandal, P. K. Sahoo
The increase of discrepancy in the standard procedure to choose the arbitrary functional form of the Lagrangian motivates us to solve this issue in modified theories of grav…
Reconstruction of the singularity-free gravity via Raychaudhuri equations
Gaurav N. Gadbail, Simran Arora, P. K. Sahoo +1
We study the bounce cosmology to construct a singularity-free model using the reconstruction technique. The formulation of the model is based on t…
Cosmological reconstruction and CDM universe in gravity
Gaurav N. Gadbail, Avik De, P. K. Sahoo
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 o…
Statistical and Observation Comparison of Weyl-Type Models with the CDM Paradigm
Gaurav N. Gadbail, Himanshu Chaudhary, Amine Bouali +1
We study the gravity in the framework of Weyl geometry (known as Weyl-type gravity), where denotes the non-metricity scalar, and denotes the energy-moment…
Correction to Lagrangian for Bouncing Cosmologies in Gravity
Gaurav N. Gadbail, Ameya Kolhatkar, Sanjay Mandal +1
Symmetric teleparallel gravity offers to reformulate the gravitational formalism without the presence of curvature and torsion with the help of non-metricity tensors. Interestingly…
Cosmology with viscous generalized Chaplygin gas in gravity
Gaurav N. Gadbail, Simran Arora, P. K. Sahoo
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 fl…
Dark energy constraint on equation of state parameter in the Weyl type gravity
Gaurav N. Gadbail, Simran Arora, P. K. Sahoo
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…
Reconstruction of Lagrangian for various cosmological scenario
Gaurav N. Gadbail, Simran Arora, P. K. Sahoo
The variety of theories that can account for the dark energy phenomenon encourages current research to concentrate on a more in-depth examination of the potential impacts of modifi…
Paramerization of deceleration parameter in gravity
Gaurav N. Gadbail, Sanjay Mandal, P. K. Sahoo
In this article, we investigate the modified symmetric teleparallel gravity or gravity, where is the non-metricity, to study the evolutionary history of the universe by…
Reconstruction of CDM Universe in Gravity
Gaurav N. Gadbail, Sanjay Mandal, P. K. Sahoo
In this manuscript, we present a number of fascinating explicit reconstructions for the gravity from the background of Friedmann-Laîmatre-Robertson-Walker (FLRW) evolution h…
Interaction of divergence-free deceleration parameter in Weyl-type gravity
Gaurav N. Gadbail, Simran Arora, Praveen Kumar +1
We study an extension of symmetric teleparallel gravity i.e. Weyl-type gravity and the divergence-free parametrization of the deceleration parameter $q(z) = q_{0}+q_{1}\fr…
Generalized Chaplygin gas and accelerating universe in gravity
Gaurav N. Gadbail, Simran Arora, P. K. Sahoo
The generalized Chaplygin gas (GCG), which has an unusual perfect fluid equation of state, is another promising candidate for dark energy. We investigate the GCG scenario coupled w…
Viscous cosmology in the Weyl-type gravity
Gaurav Gadbail, Simran Arora, P. K. Sahoo
Bulk viscosity is the only viscous influence that can change the background dynamics in a homogeneous and isotropic universe. In the present work, we analyze the bulk viscous cosmo…
Power-law cosmology in Weyl-type gravity
Gaurav Gadbail, Simran Arora, P. K. Sahoo
Gravity is attributed to the spacetime curvature in classical General Relativity (GR). But, other equivalent formulation or representations of GR, such as torsion or non-metricity…