Raw Data to 'Decay and recurrence of non-Gaussian correlations in a quantum many-body system', arXiv:2003.01808

Absorption images representing the raw data for arXiv:2003.01808, Nature Physics (2021). https://doi.org/10.1038/s41567-020-01139-2

'scan5100.zip' contains the raw data for figure 2.

'scan8679.zip', 'scan8685.zip', and 'scan8696.zip' contain the raw data for the left, middle, and right subplot of figure 3 respectively.

The absorption images are numbered consecutively.

The first image (for all scans) is taken in the direction of the double-well (DW) separation with our 'transverse' imaging system. The measurement is performed before ramping up the DW barrier. The image is taken after 11 ms time of flight (TOF). Two images are taken. One image with atoms ('1-atomcloud.tif'), and a second image to record the intensity of the imaging beam without atoms ('1-withoutatoms.tif').

The subsequent images record the interference fringes for the different evolution times (again always pairs '-atomcloud.tif' and '-withoutatoms.tif'). They are taken with our 'vertical' imaging system after 15.6 ms TOF. The imaging direction is perpendicular to the weakly confined direction of the clouds as well as the DW separation.

The recorded evolution times for scan 5100 are -2 ms (right before ramping the DW barrier up), 0 ms (right after the DW barrier is ramped up), and then in 3 ms steps until 18 ms. I.e., '2-atomcloud.tif' corresponds to -2 ms, '9-atomcloud.tif' corresponds to 18 ms. This completes the 'first repeat'. The next picture '10-atomcloud.tif' then belongs to the 'second repeat' and is again taken with the 'transverse' imaging system. The picture '11-atomcloud.tif' is then again taken with the 'vertical' imaging and corresponds to -2 ms. And so forth.

In the same way, the pictures for the other scans are ordered, only the recorded evolution times are different. The evolution times are (in ms):

scan 8679: -1.2, 0, 2.5, 5, 20 in steps of 2.5 until 32.5
scan 8685: -1.3, 0, 2.5, 5, 20 in steps of 2.5 until 32.5
scan 8696: -1.6, 0, 2.5, 5, 20 in steps of 2.5 until 32.5

The first time always corresponds to right before the DW barrier is ramped up. 0 is always right after the barrier was ramped up.

Note that for scan 8696 only the repeats 1 to 193, 215 to 246, 262 to 281, and 295 to 330 have been used. For the other repeats the digital micromirror device (DMD) shaping the optical dipole potential has failed.

In addition to the data a matlab script is provided, illustrating how to extract the two dimensional atomic density from the absorption images. It contains all relevant parameters of the imaging systems.