24 citations · 108 across the 8 of their papers we have counts for
8 papers
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…
Validating variational principle for higher order theory of gravity
Soumendranath Ruz, Kaushik Sarkar, Nayem Sk +1
Metric variation of higher order theory of gravity requires to fix the Ricci scalar in addition to the metric tensor at the boundary. Fixing Ricci scalar at the boundary implies th…
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…
Singularity free stars in (2+1) dimensions
Farook Rahaman, Ayan Banerjee, Irina Radinschi +2
We present some new types of non-singular model for anisotropic stars with constant and variable based on the Krori and Barua (KB) metric in dimensions. The solutio…
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…