Cooperative states and resonance fluorescence II

In the Stark states representation the spectrum of cooperative resonance fluorescence of one, two and three two-level atoms in the limit of high Rabi frequency has been found to consist of the harmonics ω₀ and $\text{ω}{}_0\text{± 2Ω}{}_0$, with the ratio of their intensities tending to unity as the number of atoms increases.