Photon Antibunching in Resonance Fluorescence in the Presence of Atomic Number Fluctuations

Abstract
An analysis of photon correlation measurements for fluorescent light from a beam of two-level atoms is given where the number of pulse pairs n(τ) with time separation τ is recorded using a time-to-digital converter. These measurements are shown to correspond precisely to a subsequently normalized second-order correlation function (i.e. the normalization is performed after time averaging).