102 citations · 880 across the 34 of their papers we have counts for
34 papers
Emergent Universe in f(Q) gravity theories
Hamid Shabani, Avik De, Tee-How Loo
One resolution of the ancient cosmic singularity, i.e., the Big Bang Singularity (BBS), is to assume an inflationary stage preceded by a long enough static state in which the unive…
Scalar perturbation and density contrast evolution in gravity
Ganesh Subramaniam, Avik De, Tee-How Loo +1
The symmetric teleparallel theory offers an alternative gravitational formulation which can elucidate events in the early and late universe without requiring the physical existence…
The cosmological significance of boundary term in non-metricity gravity
Hamid Shabani, Avik De, Tee-How Loo
Within the context of metric-affine gravity, we examine the significance of the boundary term in symmetric teleparallel gravity by employing the cosmological dynamical system analy…
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…
Non-metricity with bounday terms: gravity and cosmology
Avik De, Tee-How Loo, Emmanuel N. Saridakis
We formulate gravity and cosmology. Such a construction is based on the symmetric teleparallel geometry, but apart form the non-metricity scalar we incorporate in the…
Cosmology of gravity in non-flat Universe
Hamid Shabani, Avik De, Tee-How Loo +1
We investigate the cosmological implications of gravity, which is a modified theory of gravity based on non-metricity, in non-flat geometry. We perform a detailed dynamical-…
Energy condition bounds on model parameters in a curved FLRW universe
Ganesh Subramaniam, Avik De, Tee-How Loo +1
In this exclusive study of the modified theory of gravity in the open and closed type Friedmann-Lemaître-Robertson-Walker (FLRW) universe model, we impose some constraints f…
Observational constraints on two cosmological models of theory
M. Koussour, Avik De
In the past few years, theories have drawn a lot of research attention in replacing Einstein's theory of gravity successfully. The current study examines the novel cosmologi…
Anisotropic Universe in gravity, a novel study
Tee-How Loo, M. Koussour, Avik De
theory of gravity is very recently proposed to incorporate within the action Lagrangian, the trace of the energy-momentum tensor along with the non-metricity scalar $Q…
How different connections in flat FLRW geometry impact energy conditions in theory?
Ganesh Subramaniam, Avik De, Tee-How Loo +1
In this study of the modified theory of gravity in the spatially flat Friedmann-Lemaître-Robertson-Walker (FLRW) spacetime, we explore all the affine connections compatible…
Phase-space analysis of a novel cosmological model in theory
Hamid Shabani, Avik De, Tee-How Loo
The vanishing affine connections have been used solely while adopting the modified gravity theory to the cosmology. Consequently, researchers could not get beyond what is al…
Anisotropic LRS-BI Universe with gravity theory
Pranjal Sarmah, Avik De, Umananda Dev Goswami
The possible anisotropic nature in the early phases of the Universe is one of the interesting aspects of study in cosmology. We investigate the evolution of the Universe in terms o…
gravity, its covariant formulation, energy conservation and phase-space analysis
Tee-How Loo, Raja Solanki, Avik De +1
In the present article we analyze the matter-geometry coupled theory of gravity. We offer the fully covariant formulation of the theory, with which we construct the correc…
On the viability of gravity models
Avik De, Tee-How Loo
In general relativity, the contracted Bianchi identity makes the field equation compatible with the energy conservation, likewise in theories of gravity. We show that this c…
Probing symmetric teleparallel gravity in the early universe
Avik De, Dalia Saha, Ganesh Subramaniam +1
General theory of relativity can be equivalently formulated on a flat space-time associating a torsion-free affine connection of non-vanishing non-metricity scalar . In this pap…
Impact of curvature based geometric constraints on theory
Tee-How Loo, Avik De, Simran Arora +1
Theories of gravity are fundamentally a relation between matter and the geometric structure of the underlying spacetime. So once we put some additional restrictions on the spacetim…
Comment on "Energy conditions in gravity"
Avik De, Loo Tee How
In Phys. Rev. D 102, 024057 (2020), the authors studied energy conditions in theory following the same path as researchers handled the energy conditions in the curvature-bas…
Complete dark energy scenario in gravity
Raja Solanki, Avik De, P. K. Sahoo
In theoretical physics, the fundamental nature and evolution mechanism of dark energy is still an open question. In General Relativity Theory, the simplest explanation for dark ene…
Isotropization of locally rotationally symmetric Bianchi-I universe in -gravity
Avik De, Sanjay Mandal, J. T. Beh +2
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 cla…
Accelerating expansion of the universe in modified symmetric teleparallel gravity
Raja Solanki, Avik De, Sanjay Mandal +1
The fundamental nature and origin of dark energy are one of the premier mysteries of theoretical physics. In General Relativity Theory, the cosmological constant is the simples…
How a projectively flat geometry regulates -gravity theory?
Tee-How Loo, Avik De, Sanjay Mandal +1
In the present paper we examine a projectively flat spacetime solution of -gravity theory. It is seen that once we deploy projective flatness in the geometry of the spacetime…
Periodic cosmic evolution in gravity formalism
Parbati Sahoo, Avik De, Tee-How Loo +1
We study the periodic cosmic transit behavior of accelerated universe in the framework of symmetric teleparallelism. The exact solution of field equations is obtained by employing…
A complete study of conformally flat pseudo-symmetric spacetimes in the theory of F(R)-gravity
Avik De, Simran Arora, Uday Chand De +1
We investigate the geometrical and physical structures of a pseudo-symmetric spacetime with timelike vector under the condition of conformal flatness. We classify it into…
How a conformally flat (GR)4 impacts Gauss-Bonnet gravity?
Avik De, Tee-How Loo, Raja Solanki +1
First and foremost, we show that a 4-dimensional conformally flat generalized Ricci recurrent spacetime is an Einstein manifold. We examine such a spacetime as a solution…