3 papers
hep-th2025
Effective action for -Yukawa theory via 2PI formalism in the inflationary de Sitter spacetime
Sourav Bhattacharya, Kinsuk Roy
We consider a scalar field theory with quartic self interaction, Yukawa coupled to fermions in the inflationary de Sitter spacetime background. The scalar has a classical backgroun…
gr-qc2025
Spontaneous symmetry breaking induced by curvature : Analysis via non-perturbative 2PI Hartree approximation
Vishal Nath, Kinsuk Roy, Sourav Bhattacharya
In this work we investigate the spontaneous symmetry breaking (SSB) induced by a classical background spacetime's curvature, via the 2 particle irreducible (2PI) non-perturbative e…
hep-th2024
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(Ï)= λ…