Upon coupling to the cavity, we found that the role of the cavity field is to promote the |ν L ⟩ → |ν ′ L ⟩ transition, causing a larger steady-state population of the |ν ′ L ⟩ and |ν ′ R ⟩ states. As such, the cavity mode qc acts like a rate promoting vibrational mode, causing the rate constant enhancement. We further assumed that the rate constant inside the cavity k can be decomposed as