Exciton-polaritons, light-matter hybrid states with cavity photon frequencies in the eV-range, have recently become a topic of great interest for their ability to alter both chemical reactions/properties in the ground and excited states as well as photo-physics/spectroscopies such as quasi-particle propagation . Much theoretical work has been performed to simulate these intrinsically many-body systems ]. An exciton-polariton is an entangled state of light and matter in which the native excitonic and photonic degrees of freedom hybridize to form new states. These new states can be tuned in various ways to modify chemical and physical properties, such as the potential energy landscape or the emission efficiency of materials. However, much is still unknown about these new hybrid states. For example, collective effects -which arise from the coherent coupling of N = 2 -10 10 molecules to a single optical cavity mode -are largely unexplored due to the size complexity of the light-matter Hamiltonian.