Photon coincidence spectroscopy for two-atom cavity quantum electrodynamics

We show that photon coincidence spectroscopy can provide an unambiguous signature of two atoms simultaneously interacting with a quantized cavity field mode. We also show that the single-atom Jaynes-Cummings model can be probed effectively via photon coincidence spectroscopy, even with deleterious contributions to the signal from two-atom events. In addition, we have explicitly solved the eigenvectors and eigenvalues of two two-level atoms coupled to a quantized cavity mode for differing coupling strengths.