Non-perturbative analysis for a massless minimal quantum scalar with $V(\varphi )=\lambda {\varphi }^4/4!+\beta {\varphi }^3/3!$ 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, $V(\varphi )=\lambda {\varphi }^4/4!+\beta {\varphi }^3/3!$ ($\lambda >0$) in the inflationary de Sitter spacetime…