(28) Importantly, the prefactor in k +{A} is independent of N due to the cancellation of the 1/N factor in |V +A j | 2 with the sum over N acceptor states. The only N dependence in k +{A} is the collective coupling √ Ng c which reduces the driving force (and alters the mixing angle Φ when detuning is present). For the case λ D = 0, this total rate constant k +{A} is equivalent to the Marcus PMET rate constant between the UP and acceptor for a single molecule with a light-matter coupling strength equal to