Reduced Density-Matrix Approach to Strong Matter-Photon Interaction.

ABSTRACT: We present a first-principles approach to electronic many-body systems strongly coupled to cavity modes in terms of matter-photon one-body reduced density matrices. The theory is fundamentally nonperturbative and thus captures not only the effects of correlated electronic systems but accounts also for strong interactions between matter and photon degrees of freedom. We do so by introducing a higher-dimensional auxiliary system that maps the coupled fermion-boson system to a dressed fermionic problem. This reformulation allows us to overcome many fundamental challenges of density-matrix theory in the context of coupled fermion-boson systems and we can employ conventional reduced density-matrix functional theory developed for purely fermionic systems. We provide results for one-dimensional m

SUBMITTER: Buchholz F 

PROVIDER: S-EPMC6875895 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature