Mavroyannis, Constantine; Sharma, M.P. - In: Physica A: Statistical Mechanics and its Applications 102 (1980) 3, pp. 431-446
We have calculated the Green function describing the physical process where a three level atom interacts with a strong pump field as well as with a weak perturbing signal field in the limit of high photon densities. The theory is then used to describe the cooperative two-photon resonance...