Fig. 5. Polaritonic dissymmetry and dispersion with and without the three-state approximation (TSA).

Polaritonic dissymmetry ${\tilde{g}}^{\alpha }$ as a function of (angular) cavity frequency Ω for the minimal configuration of two transition dipoles obtained through a numerical diagonalization of the Hamiltonian given by Eq. (13) (a), and comparative results within the TSA (b) which only includes explicitly the lowest-energy excited state (n = 1). Unless noted otherwise, parameters are identical to Fig. 2, while the vector potential is taken to be A₀ = 35 eV e⁻¹c⁻¹. Note that colors have been linearly interpolated for a smoother gradient.