99 citations · 2.7k across the 93 of their papers we have counts for
7 papers · 1 filter
RRR fluctuations from non-singular bounce
Sayantan Choudhury
We present a consistent treatment of regularization, renormalization, and resummation in a framework involving a contracting phase, a non-singular bounce, and inflation with a shar…
Reconstructing inflationary potential from NANOGrav 15-year Data: A robust study using Non-Bunch Davies initial condition
Sayantan Choudhury
We discuss the theoretical framework behind reconstruction of a generic class of inflationary potentials for canonical single-field slow-roll inflation in a model-independent fashi…
Large fluctuations and Primordial Black Holes
Sayantan Choudhury, M. Sami
In this paper, we review in detail different mechanisms of generation of large primordial fluctuations and their implications for the production of primordial black holes (PBHs) an…
Four-mode squeezed states in de Sitter space: A study with two field interacting quantum system
Sayantan Choudhury, Sudhakar Panda, Nilesh Pandey +1
In this paper we study the application of four-mode squeezed states in the cosmological context, studying two weakly coupled scalar fields in the planar patch of the de Sitter spac…
Primordial Gravitational Wave Circuit Complexity
Kiran Adhikari, Sayantan Choudhury, Hardey N. Pandya +1
In this article, we investigate various physical implications of quantum circuit complexity using squeezed state formalism of Primordial Gravitational Waves (PGW). Recently quantum…
Cosmological Geometric Phase From Pure Quantum States: A study without/with having Bell's inequality violation
Sayantan Choudhury
In this paper, using the concept of Lewis Riesenfeld invariant quantum operator method for finding continuous eigenvalues of quantum mechanical wave functions we derive the analyti…