This repository contains the data used in an experiment concerning the simultaneous scattering of two photons by a single atom. For more information, please see the following publication:

    [https://doi.org/10.1038/s41566-023-01260-7]
    [https://doi.org/10.48550/arXiv.2209.02547]

We provide the data presented in the manuscript in the form of .txt files encoded in the Unicode standard UTF-8. Each file is saved with the name of the figure in which its contents are displayed and numbered in the order of appearance in the manuscript. The files contain columns of measurement data that are separated by the delimiter “, ”, and labeled appropiately. In the following, we describe the file contents in more detail.

File "00_Fig2a-inset.txt" contains two columns;

    the time in seconds
    the counts per 60 milliseconds

File "01_Fig2b-inset.txt" contains two columns;

    the laser detuning in megahertz
    the normalised transmission
    
File "02_Fig3.txt" contains eight columns;
	
    tau in nanoseconds
    number of coincidences for kappa_{ext} = 0.00 kappa_0
    number of coincidences for kappa_{ext} = 0.30 kappa_0
    number of coincidences for kappa_{ext} = 0.44 kappa_0
    number of coincidences for kappa_{ext} = 1.00 kappa_0
    number of coincidences for kappa_{ext} = 2.23 kappa_0
    number of coincidences for kappa_{ext} = 3.23 kappa_0
    number of coincidences for kappa_{ext} = 5.12 kappa_0

File "03_Fig4-main.txt" contains four columns;

    dimensionless kappa_{ext}/kappa_0
    sigma uncertainty in kappa_{ext}/kappa_0
    value of the second order correlation function at tau = 0
    sigma uncertainty in the value of the second order correlation function at tau = 0

File "04_Fig4-inset.txt" contains three columns;

    dimensionless kappa_{ext}/kappa_0
    sigma uncertainty in kappa_{ext}/kappa_0
    scattering rate in kilohertz

File "05_Extended-Data_Fig1.txt" contains two columns;

    counts per 50 milliseconds
    number of samples divided by one thousand

File "06_Extended-Data_Fig2.txt" contains two columns;

    full-width half-maximum linewidth in megahertz
    transmission on resonance

File "07_Extended-Data_Fig3.txt" contains two columns;

    tau in nanoseconds
    number of coincidences for kappa_{ext} = 0