The Coherence Of Resonance Fluorescence And Localization Of The Relative Position For Two Atoms In A Cavity

The studies of the coherence of resonance fluorescence and the measurement of relative position for two atoms not only validate the basic theory of quantum mechanics, but also push the development of quantum information.We have investigated the coherence of resonance fluorescence for a coherently driven two two-level atoms coupled to a single-mode cavity in the bad cavity limit.By adjusting the detuning of the cavity-mode frequency from the driving filed frequency, we can enhance the fringe contrast factor as well as decrease the second order correlation function.It is found that the detuning has an effect on the atomic dress-state population,which makes the fringe contrast factor and the second order correlation function changed evidently.We have investigated the localization of the two atoms passing through a standing wave in an optical cavity by measuring the field quadrature , it can be found that the localization of the two atoms can be better resolved in the absence of the damping of cavity. If we take into account the damping of cavity, the damage of atomic-position localization resulting from the damping of cavity can be decreased by feeding back into the cavity part of the output signal.