11 citations · 41 across the 11 of their papers we have counts for
12 papers
Vulnerability of f(Q) gravity theory and a possible resolution
Dalia Saha, Abhik Kumar Sanyal
Both the generalized teleparallel theories of gravity suffer from some serious problems. The strong coupling issue appearing as a consequence of extra degrees of freedom in the `ge…
Phase space structure of symmetric teleparallel theory of gravity
Dalia Saha, Abhik Kumar Sanyal
The `Generalized Symmetric Teleparallel Gravity' (GSTG) does not admit diffeomorphic invariance, since the auxiliary field as well as the shift vector act as non-propagating dynami…
Issue of Branched Hamiltonian, Inflation and indispensability of scalar field in generalized Teleparallel theories
Dalia Saha, Jyoti Prasad Saha, Abhik kumar sanyal
Generalized Teleparallel gravity theories were proposed as alternatives to the dark energy and modified theories of gravity. However, minimal generalization of TEGR and STEGR lead…
Reconstructing modified and alternative theories of gravity
Dalia Saha, Manas Chakrabortty, Abhik Kumar Sanyal
A viable radiation dominated era in the early universe is best described by the standard (FLRW) model of cosmology. In this short review, we demonstrate reconstruction of the forms…
Inflation and cosmological evolution with gravity theory
Dalia Saha, Jyoti Prasad Saha, Abhik Kumar Sanyal
In the last decade Planck PR4 data together with ground-based experimental data such as, BK18, BAO and CMB lensing, tightened constraint of the tensor to scalar ratio, starting for…
Perusing Buchbinder--Lyakhovich canonical formalism for Higher-Order Theories of Gravity
Dalia Saha, Abhik Kumar Sanyal
Ostrogradsky's, Dirac's and Horowitz's techniques of higher order theories of gravity produce identical phase-space structures. The problem is manifested in the case of Gauss-Bonne…
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…
Inflation -- a Comparative Study Amongst Different Modified Gravity Theories
Dalia Saha, Abhik Kumar Sanyal
In the recent years, a host of modified gravity models have been proposed as alternatives to the dark energy. A quantum theory of gravity also requires to modify `General Theory of…
Conflict between some higher-order curvature invariant terms
Dalia Saha, Mohosin Alam, Ranajit Mandal +1
A viable quantum theory does not allow curvature invariant terms of different higher orders to be accommodated in the gravitational action. We show that there is indeed a conflict…
Early universe in view of a modified theory of gravity
Ranajit Mandal, Dalia Saha, Mohosin Alam +1
We study the quantum evolution of the early universe, its semi-classical analogue together with inflationary regime, in view of a generalized modified theory of gravity. The action…
Inflation with scalar-tensor theory of gravity
Dalia Saha, Susmita Sanyal, Abhik Kumar Sanyal
The latest released data from Planck in 2018, put up tighter constraints on inflationary parameters. In the present article, the in-built symmetry of the non-minimally coupled scal…
Probing the early universe with a generalized action
Ranajit Mandal, Dalia Saha, Mohosin Alam +1
Possibly, the most general action in the background of isotropic and homogeneous space-time has been considered to study the quantum evolution of the early universe, apart from a c…