Indistinguishability and correlations of photons generated by quantum emitters undergoing spectral diffusion
Published Web Locationhttps://doi.org/10.1038/srep03996
Photon-based quantum information processing is based on manipulating multi photon interference. We focus on the Hong-Ou-Mandel (HOM) dip in the photon coincidence rate which provides a direct measure of interference of indistinguishable photons linked to their Bose statistics. The effect has been first observed with entangled photons generated by parametric down conversion and then extended to independent emitters. Fluctuations caused by coupling between emitters and a bath can Erode the interference which causes the dip. Here we show how the magnitude and shape of theHOMdip is affected by spectral diffusion induced by coupling to a brownian oscillator bath. Conditions for maintaining and controlling the interference are specified.