7 citations · 7 across the 2 of their papers we have counts for
8 papers
The validity of separate-universe approach in transient ultra-slow-roll inflation
Rathul Nath Raveendran
We investigate the breakdown of the separate-universe approximation during transitions in transient ultra-slow-roll inflation by analyzing the evolution of the comoving curvature p…
Violation of Bell inequality from a squeezed coherent state of inflationary perturbations
Aurindam Mondal, Rathul Nath Raveendran
We investigate the quantum nature of primordial perturbations by studying the violation of Bell inequality when the initial state is taken to be a coherent state rather than the us…
Conserved cosmological perturbations in USR inflation and bouncing scenarios
Rathul Nath Raveendran
Inflationary and bouncing scenarios are two frameworks that provide the mechanism to overcome the horizon problem as well as generate the primordial perturbations. In this work, we…
Mimicking two field inflationary features with a single field
Anvy Moly Tom, Rathul Nath Raveendran
It is well known that damped superimposed oscillations at large scales in the primordial power spectrum can be generated in both single field and two field models. In single field…
Reconstruction of potentials of the hybrid inflation in the light of primordial black hole formation
Ki-Young Choi, Su-beom Kang, Rathul Nath Raveendran
The large enhancement of the primordial power spectrum of the curvature perturbation can seed the formation of primordial black hole, that can play as a dark matter component in th…
A gauge invariant prescription to avoid -crossing instability in Galileon bounce
Rathul Nath Raveendran
We revisit the evolutions of scalar perturbations in a non-singular Galileon bounce. It is known that the second order differential equation governing the perturbations is numerica…