3 papers
gr-qc2026
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…
astro-ph.CO2025
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…
astro-ph.CO2024
Distinguishing cosmological models through quantum signatures of primordial perturbations
Rathul Nath Raveendran, Sumanta Chakraborty
We study the evolution of various measures of quantumness of the curvature perturbation by integrating out the inaccessible entropic fluctuations in the multi-field models of infla…