170 citations · 540 across the 11 of their papers we have counts for
12 papers
Amplifying quantum discord during inflationary magnetogenesis through violation of parity
Sagarika Tripathy, Rathul Nath Raveendran, Krishnamohan Parattu +1
It is well known that, during inflation, the conformal invariance of the electromagnetic action has to be broken in order to produce magnetic fields of observed strengths today. Of…
Enhanced power on small scales and evolution of quantum state of perturbations in single and two field inflationary models
Rathul Nath Raveendran, Krishnamohan Parattu, L. Sriramkumar
With the detection of gravitational waves from merging binary black holes, over the last few years, there has been a considerable interest in the literature to understand if these…
The Life and Science of Thanu Padmanabhan
Jasjeet Singh Bagla, Krishnakanta Bhattacharya, Sumanta Chakraborty +21
Thanu Padmanabhan was a renowned Indian theoretical physicist known for his research in general relativity, cosmology, and quantum gravity. In an extraordinary career spanning fort…
Null boundary terms for Lanczos-Lovelock gravity
Sumanta Chakraborty, Krishnamohan Parattu
We derive boundary terms appropriate for the general Lanczos-Lovelock action on a null boundary, when Dirichlet boundary conditions are imposed. We believe that these boundary term…
A Novel Derivation of the Boundary Term for the Action in Lanczos-Lovelock Gravity
Sumanta Chakraborty, Krishnamohan Parattu, T. Padmanabhan
We present a novel derivation of the boundary term for the action in Lanczos-Lovelock gravity, starting from the boundary contribution in the variation of the Lanczos-Lovelock acti…
Variational Principle for Gravity with Null and Non-null boundaries: A Unified Boundary Counter-term
Krishnamohan Parattu, Sumanta Chakraborty, T. Padmanabhan
It is common knowledge that the Einstein-Hilbert action does not furnish a well-posed variational principle. The usual solution to this problem is to add an extra boundary term to…