The Rabi splitting is nuclear configuration dependent, due to the nuclear-dependent adiabatic energy gap and dipole (both transition and permanent dipoles). This avoided crossing region centered at the Rabi splitting, along with the nearby polariton-induced conical intersection (where the light-matter coupling term μ • ê (Eq. 104) goes to zero because the component of the dipole along the cavity field polarization direction goes to zero for a certain nuclear configuration), allows for population to transfer between the upper and lower polariton surfaces.