72 citations · 628 across the 49 of their papers we have counts for
51 papers
Entanglement generation between Unruh-DeWitt detectors in the de Sitter spacetime-analysis with complex scalar fields
Shagun Kaushal, Sourav Bhattacharya
We investigate the entanglement generation or harvesting between two identical, comoving Unruh-DeWitt detectors in the cosmological de Sitter spacetime. The detectors are assumed t…
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^…
Non-perturbative , and the dynamically generated scalar mass with Yukawa interaction in the inflationary de Sitter spacetime
Sourav Bhattacharya, Moutushi Dutta Choudhury
We consider a massless minimally coupled self interacting quantum scalar field coupled to fermion via the Yukawa interaction, in the inflationary de Sitter background. The fermion…
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…
Stationary black holes and stars in the Brans-Dicke theory with revisited
Md Sabir Ali, Sourav Bhattacharya, Shagun Kaushal
It was shown a few years back that for a stationary regular black hole or star solution in the Brans-Dicke theory with a positive cosmological constant , endowed with a de Sitte…
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…