186 citations · 2.1k across the 68 of their papers we have counts for
18 papers · 1 filter
The Borde-Guth-Vilenkin Theorem in extended de Sitter spaces
William H. Kinney, Suvashis Maity, L. Sriramkumar
The Borde-Guth-Vilenkin (BGV) theorem states that any spacetime with net positive expansion must be geodesically incomplete. We derive a new version of the theorem using the fluid…
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…
Radiative processes of single and entangled detectors on circular trajectories in (2+1) dimensional Minkowski spacetime
Subhajit Barman, Bibhas Ranjan Majhi, L. Sriramkumar
We investigate the radiative processes involving two entangled Unruh-DeWitt detectors that are moving on circular trajectories in -dimensional Minkowski spacetime. We assume…
Can non-minimal coupling restore the consistency condition in bouncing universes?
Debottam Nandi, L. Sriramkumar
An important property of the three-point functions generated in the early universe is the so-called consistency condition. According to the condition, in the squeezed limit wherein…
Response of a rotating detector coupled to a polymer quantized field
D. Jaffino Stargen, Nirmalya Kajuri, L. Sriramkumar
Assuming that high energy effects may alter the standard dispersion relations governing quantized fields, the influence of such modifications on various phenomena has been studied…
Viable tensor-to-scalar ratio in a symmetric matter bounce
Rathul Nath Raveendran, Debika Chowdhury, L. Sriramkumar
Matter bounces refer to scenarios wherein the universe contracts at early times as in a matter dominated epoch until the scale factor reaches a minimum, after which it starts expan…