  Superradiance, in which the collective behavior of emitters can generate
enhanced radiative decay, was first predicted by a model, now known as the
Dicke model, that contains a collection of two-level systems (the emitters) all
interacting with the same photonic mode. In this article, we extend the
original Dicke model to elucidate the influence of nuclear motion on
superradiant emission. Our dynamical simulations of the combined electronic,
nuclear, and photonic system reveal a new time scale attributed to the
population leakage of the dark, subradiant states. Furthermore, this dark state
emission pathway can be controlled by tuning the nuclear potential energy
landscape. These findings impact how superradiant states and molecular degrees
of freedom can be leveraged and utilized in quantum optical systems.
