The role of dephasing for dark state coupling in a molecular Tavis-Cummings model

TL;DR

This paper explores how pure dephasing affects dark state dynamics in a molecular Tavis-Cummings model, revealing that dephasing rate and particle number significantly influence dark state populations.

Contribution

It introduces a model incorporating pure dephasing into the molecular Tavis-Cummings framework, highlighting its impact on dark state behavior.

Findings

Dephasing rate significantly influences dark state populations.

Number of particles affects the dark state dynamics.

Pure dephasing alters the symmetry-breaking in the model.

Abstract

Collective coupling of an ensemble of particles to a light field is commonly described by the Tavis--Cummings model. This model includes numerous eigenstates which are optically decoupled from the optically bright polariton states. To access these dark states requires breaking the symmetry in the corresponding Hamiltonian. In this paper, we investigate the influence of non-unitary processes on the dark state dynamics in molecular Tavis--Cummings model. The system is modelled with a Lindblad equation that includes pure dephasing, as they would be caused by weak interactions with an environment, and photon decay. Our simulations show that the rate of the pure dephasing, as well as the number of particles, has a significant influence on the dark state population.