Ref. 8 analyzes the effect of collective coupling on the modification of such excited state electron transfer reactions via the modification of reorganization energy with the key results shown in Fig. . The bare donor and acceptor states are displaced along the nuclear coordinate (along vibrational DOF) and thus have substantial reorganization energy relative to the ground state (Fig. ). In this example, the donor state minima R D 0 < 0 and the acceptor state minima R A 0 > 0 are shifted in opposite directions with respect to the ground state minima (set as the origin). Thus, the reorganization energy between the donor and acceptor states is the sum of the reorganization energies λ D + λ A where λ D = 1 2 (ω D R D 0 ) 2 is the of the donor reorganization en- ergy relative to the ground state with ω D as the donorwell frequency, and λ A = 1 2 (ω A R A 0 ) 2 is the acceptor reorganization energy relative to the ground state with ω A as the acceptor well frequency. When there are N donor-acceptor pairs whose ground-donor transition is coupled to a cavity, the resulting polariton states are super-positions of the donor states with 0 photons in the cavity and the and the ground state with 1 photon in the cavity.