Enhancement of Polariton Coherence Due to Collective Coupling Effect

Molecular polaritons, which are hybridization of matter states from molecules with photons in a cavity, play an important role in fundamental quantum science and technology. However, molecular polaritons experience significant decoherence due to interactions between the molecules' matter states and their corresponding vibrational states. In this work, we show that, despite such decoherences, hybridizing many molecules in a cavity provides enhancement to the overall quantum coherence of the hybrid states due to collective light-matter coupling effect. Numerical results from the hierarchical equations of motion dynamical method provide validation of this collective coupling effect on the coherence lifetimes.