A bstract In our quest to understand the generation of cosmological perturbations, we face
two serious obstacles: we do not have direct information about the environment experienced …

In order to unravel the present situation of the PBH overproduction problem, our study
emphasizes the critical role played by the equation of state (EoS) parameter w within the …

We compute the rate with which unobserved fields decohere other fields to which they
couple, both in flat space and in de Sitter space, for spectator scalar fields prepared in their …

We investigate quantum decoherence in a class of models which interpolates between
expanding (inflation) and contracting (ekpyrosis) scenarios. For the cases which result in a …

Recently, in various theoretical works, path-breaking progress has been made in recovering
the well-known page curve of an evaporating black hole with quantum extremal islands …

We present a complete and consistent exposition of the regularization, renormalization, and
resummation procedures in the setup of having a contraction and then non-singular bounce …

Abstract $ Circuit~ Complexity $, a well known computational technique has recently
become the backbone of the physics community to probe the chaotic behaviour and random …

The out-of-time-ordered correlation (OTOC) function is an important new probe in quantum
field theory which is treated as a significant measure of random quantum correlations. In this …

In this work, our prime objective is to study non-locality and long range effect of two body
correlation using quantum entanglement from various information theoretic measure in the …

The concept of the out-of-time-ordered correlation (OTOC) function is treated as a very
strong theoretical probe of quantum randomness, using which one can study both chaotic …