Interference Pattern in Resonance Fluorescence from Two Atom System

It is studied the fringe contras factor of the fluoresence field emitted by two interacting atoms driven by a cohernt field and a squeezed vacuum field. The result shows that both the Rabi fhequency and the phase differnce between the coherent field and the squeezed vacuum field affect the interfrenc pattem signficantly. Nonzero phase difference and intermediate Rabi frequency can lead to the vanishing of the dark center.