QED approaches, we showed that scQED approaches based on Eq. 2 lead to faster convergence of the photonic Fock space. In Figure we consider the same potential energy scan and compare the pCS(500,2)/6-311G and pPF(500,10)/6-311G levels to pPF-FCI-10/6-311G. In this case, we see that the pCS(500,2)/6-311G energies are indistinguishable from the pPF(500,10)/6-311G energies, suggesting that the same convergence of the photonic Fock space can be realized from the coherent state transformation in pQED approaches as has been observed in scQED approaches.