Atom detection in a two-mode optical cavity with intermediate coupling: Autocorrelation studies

Abstract

We use an optical cavity in the regime of intermediate coupling between atom and cavity mode to detect single moving atoms. Degenerate polarization modes allow excitation of the atoms in one mode and collection of spontaneous emission in the other, while keeping separate the two sources of light; we obtain a higher confidence and efficiency of detection by adding cavity-enhanced Faraday rotation. Both methods greatly benefit from coincidence detection of photons, attaining fidelities in excess of 99% in less than 1 microsecond. Detailed studies of the second-order intensity autocorrelation function of light from the signal mode reveal evidence of antibunched photon emissions and the dynamics of single-atom transits.

10 pages, 10 figures, to be published in Phys. Rev. A

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• Spontaneous creation and persistence of ground-state coherence in a resonantly driven intra-cavity atomic ensemble
• Collective atomic-population-inversion and stimulated radiation for two-componentBose-Einstein condensate in an optical cavity
• Conditional control of quantum beats in a cavity QED system
• High flux cold Rubidium atomic beam for strongly coupled Cavity QED
• Feedback in a cavity QED system for control of quantum beats