Superradiance mediated via vibrations and non-adiabatic transitions

Superradiance, in which collective spontaneous emission of emitters generates enhanced radiative decay, is first understood with Dicke model concerning the coherent dynamics of an ensemble of resonant two-level emitters. However, fully leveraging the potential of superradiance in quantum optical applications requires a theoretical understanding of the role atomic degrees of freedom play in the emission process, which is beyond the conventional description. To this end, we incorporate the trajectory-based semiclassical dynamics into the dissipative master equation that accounts for polaritonic state evolution to explicitly include nuclear dynamics in the simulations of radiative decay. The approach is applied to both an optical cycling center and nanocuboid emitters system and we demonstrate that superradiant emission rate can be significantly mediated by energetic fluctuations from atomic vibrations and by non-adiabatic electronic transitions.