25 citations · 146 across the 11 of their papers we have counts for
11 papers
Canonical equivalence, quantization and anisotropic inflation in higher order theory of gravity
Subhra Debnath, Abhik Kumar Sanyal
We construct phase-space structure of a typical higher-order theory of gravity, in the background of anisotropic Bianchi-1 mini-superspace, following `Modified Horowitz Formalism'…
Canonical equivalence in anisotropic models for higher order theory of gravity
Subhra Debnath, Abhik Kumar Sanyal
We show that as in the case of isotropic models, the `Dirac Algorithm' and `Modified Horowitz' Formalism' lead to identical phase-space structure of the Hamiltonian for the gravita…
Thermodynamics of irreversible particle creation phenomena and its cosmological consequence
Abhik Kumar Sanyal, Subhra Debnath
The study of particle creation phenomena at the expense of the gravitational field is of great research interest. It might solve the cosmological puzzle single-handedly, without th…
History of cosmic evolution with modified Gauss-Bonnet-dilatonic coupled term
Subhra Debnath, Soumendra Nath Ruz, Ranajit Mandal +1
Gauss-Bonnet-dilatonic coupling in four dimension plays an important role to explain late time cosmic evolution. However, this term is an outcome of low energy string effective act…
Resolving the issue of branched Hamiltonian in modified Lanczos-Lovelock gravity
Soumendranath Ruz, Ranajit Mandal, Subhra Debnath +1
The Hamiltonian constraint Hc = NH = 0, defines a diffeomorphic structure on spatial manifolds by the lapse function N in general theory of relativity. However, it is not manifest…
Canonical formulation of scalar curvature squared action in higher dimensions
Subhra Debnath, Soumendranath Ruz, Abhik Kumar Sanyal
Canonical formulation for an action containing scalar curvature squared term in arbitrary dimension has been performed in maximally symmetric space-time. The quantum dynami…
Euclidean wormholes with minimally coupled scalar fields
Soumendranath Ruz, Subhra Debnath, Abhik Kumar Sanyal +1
A detailed study of quantum and semiclassical Euclidean wormholes for Einstein's theory with a minimally coupled scalar field has been performed for a class of potentials. Massless…
Viability of Noether symmetry of F(R) theory of gravity
Kaushik Sarkar, Nayem Sk., Subhra Debnath +1
Canonization of F(R) theory of gravity to explore Noether symmetry is performed treating R - 6(\frac{\ddot a}{a} + \frac{\dot a^2}{a^2} + \frac{k}{a^2}) = 0 as a constraint of the…
Why Noether symmetry of F(R) theory yields three-half power law?
Kaushik Sarkar, Nayem Sk., Soumendranath Ruz +2
Noether symmetry of F(R) theory of gravity in vacuum or in matter dominated era yields three-half power law of R. We show that this particular curvature invariant term is very spec…
Canonical formulation of curvature squared action in the presence of lapse function
Abhik Kumar Sanyal, Subhra Debnath, Soumendranath Ruz
Lapse function appears as Lagrange multiplier in Einstein-Hilbert action and its variation leads to the (0 0) equation of Einstein, which corresponds to the Hamiltonian constraint…
Can particle creation phenomena replace dark energy?
Subhra Debnath, Abhik Kumar Sanyal
Particle creation at the expense of gravitational field might be sufficient to explain the cosmic evolution history, without the need of dark energy at all. This phenomena has been…