30 citations · 83 across the 9 of their papers we have counts for
9 papers
Some aspects of quantum correlations and decoherence in the cosmological spacetimes
Nitin Joshi
This thesis presents a theoretical investigation into the quantum field theoretic aspects of quantum correlations and decoherence in the cosmological spacetimes. We shall focus on…
Resummation of local and non-local scalar self energies via the Schwinger-Dyson equation in de Sitter spacetime
Sourav Bhattacharya, Nitin Joshi, Kinsuk Roy
We consider a massless and minimally coupled self interacting quantum scalar field in the inflationary de Sitter spacetime. The scalar potential is taken to be a hybrid, $V(ϕ)= λϕ^…
Decoherence and entropy generation at one loop in the inflationary de Sitter spacetime for Yukawa interaction
Sourav Bhattacharya, Nitin Joshi
The decoherence mechanism is believed to be possibly connected to the quantum to classical transition of the primordial cosmological perturbations in the early universe. In this pa…
Non-perturbative analysis for a massless minimal quantum scalar with in the inflationary de Sitter spacetime
Sourav Bhattacharya, Nitin Joshi
We consider a massless, minimally coupled quantum scalar field theory with an asymmetric self interaction, () in the inflationary de Sitter spacetime…
Cosmological and black hole islands in multi-event horizon spacetimes
Gopal Yadav, Nitin Joshi
In this paper, we have analyzed the information paradox and its resolution using island proposal in Schwarzschild de-Sitter black hole spacetime. First, we study the information pa…
Decoherence and entropy generation in an open quantum scalar-fermion system with Yukawa interaction
Sourav Bhattacharya, Nitin Joshi, Shagun Kaushal
We have studied the decoherence mechanism in a fermion and scalar quantum field theory with the Yukawa interaction in the Minkowski spacetime, using the non-equilibrium effective f…
Entanglement degradation in multi-event horizon spacetimes
Sourav Bhattacharya, Nitin Joshi
We investigate the degradation of quantum entanglement in the Schwarzschild-de Sitter black hole spacetime, by studying the mutual information and the logarithmic negativity for ma…
Some measures for fermionic entanglement in the cosmological de Sitter spacetime
Sourav Bhattacharya, Himanshu Gaur, Nitin Joshi
We investigate two measures of quantum correlations and entanglement, namely the violation of the Bell-Mermin-Klyshko inequalities and the quantum discord, for Dirac fermions in th…
Martin David Kruskal: a biographical memoir
J. D. Gibbon, S. C. Cowley, N. Joshi +1
Martin David Kruskal was one of the most versatile theoretical physicists of his generation and is distinguished for his enduring work in several different areas, most notably plas…