Interference Pattern in Resonance Fluorescence from Two Atom System

It is studied the fringe contrast factor of the fluoresence field emitted by two interacting atoms driven by a coherent field and a squeezed vacuum field. The result shows that both the Rabi frequency and the phase difference between the coherent field and the squeezed vacuum field affect the interference pattern significantly. Nonzero phase difference and intermediate Rabi frequency can lead to the vanishing of the dark center.