where q 0 ν (R) = λ ωc • µ νν (R). Notice that the photon field is now described by the MH-state specific displaced harmonic oscillators centered around -q 0 ν (R). This displacement can be viewed as a polarization of the photon field due to the presence of the molecule-cavity coupling, such that the photon field corresponds to a nonzero (hence polarized) electric field, in contrast to the vacuum photon field. Within this representation the Fock states have been explicitly shifted by a quantity proportional to the molecular dipoles and light-matter coupling λ, whose shift is evident from direct examination of the last term in Eq. 109.