9 citations · 17 across the 12 of their papers we have counts for
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Constant-Roll Inflation as a Competitive Alternative to Slow-Roll Inflation
Sandip Biswas, Rajib Saha, Kaushik Bhattacharya
Starting from the constant-roll condition, which involves the constant-roll parameter , which is a fundamental constant in the constant-roll inflationary models, we derive the s…
Sub-Horizon and Quasi-Static Approximations in Interacting Dark Sector Models Involving Scalar Field Dark Energy
Priyanka Saha, Sharvari Nadkarni-Ghosh, Kaushik bhattacharya
We investigate the validity of the sub-horizon approximation (SHA) and quasi-static approximation (QSA) for linear matter perturbations in interacting scalar-field dark-energy mode…
A Potential Black Hole Mimicker From Non-Minimal Coupling
Debanjan Debnath, Rikpratik Sengupta, Kaushik Bhattacharya
We present a class of horizonless, regular ultra-compact objects arising in a theory of gravity that allows curvature-fluid coupling. The non-minimal interaction between fluid vari…
Junction Conditions and Gravitational Collapse in Scalar-Tensor-Vector Gravity
Debanjan Debnath, Anant Badal, Kaushik Bhattacharya
We formulate the junction conditions for Scalar-Tensor-Vector Gravity (STVG/MOG), proposed by J.~W.~Moffat. Using these conditions, the theory of gravitational collapse is construc…
Bounce, Turnaround, and the Anisotropy Problem in Cyclic Cosmology on a Brane with a Timelike Extra Dimension
Rikpratik Sengupta, Arkajit Aich, Kaushik Bhattacharya
We study cosmological bounces, turnarounds, and cyclic evolution on an anisotropic Bianchi-I brane embedded in a five-dimensional bulk with a \emph{timelike} extra dimension, withi…