Data for "Quantum measurement arrow of time and fluctuation relations for measuring spin of ultracold atoms". Folder "GG_Data" contains .csv data files used to produce Figs. 1 and 2 of the main text. Folder "LGG_Data" contains .csv data files used to produce Fig. 3 of the main text. Folder "SupplementaryFigure1_Data" contains .csv data files used in Supplementary Fig. 1 (interference) Code for "Quantum measurement arrow of time and fluctuation relations for measuring spin of ultracold atoms". Folder "Code" contains Mathematica 10 and 12 notebooks used to generate the values recorded in "SourceData.ods". These values were used for plotting the fluctuation theorem in the following figures: Figs. 1, 2 of the main text: "MainText_GG_arrowOfTime_distribution.nb" Fig. 3 of the main text: "MainText_LGG_Irreversibility.nb" Also included are Mathematica notebook used to generate Supplementary Figs. 25 to 36: "SupplementaryInformation_LGG_Figs.nb" Mathematica notebook used for theory simulation of the LGG case: "SupplementaryInformation_LGG_theorySimulation.nb"

NPB and MJ acknowledge support from the NSF under Grant No. PHY-1708008 and NASA/JPL RSA Grant No. 1616833. ANJ and SKM acknowledge support from the NSF under award DMR-1809343.