In the fluorescence light of a single atom, the probability for emission of a photon with certain polarization depends on the polarization of the photon emitted immediately before it. Here correlations of such kind are investigated with a single trapped calcium ion by means of second order correlation functions. A theoretical model is developed and fitted to the experimental data, which show 91% probability for the emission of polarization-correlated photon pairs within 24 ns.
@article{arxiv.0911.4846,
title = {Polarization-correlated photon pairs from a single ion},
author = {F. Rohde and J. Huwer and N. Piro and M. Almendros and C. Schuck and F. Dubin and J. Eschner},
journal= {arXiv preprint arXiv:0911.4846},
year = {2015}
}