Optimized Observable Readout from Single-shot Images of Ultracold Atoms via Machine Learning

Single-shot images are the standard readout of experiments with ultracold atoms – the tarnished looking glass into their many-body physics. The efficient extraction of observables from single- shot images is thus crucial. Here, we demonstrate how artificial neural networks can optimize this extraction. In contrast to standard averaging approaches, machine learning allows both one- and two-particle densities to be accurately obtained from a drastically reduced number of single-shot images. Quantum fluctuations and correlations are directly harnessed to obtain physical observables for bosons in a tilted double-well potential at an unprecedented accuracy. Strikingly, machine learning also enables a reliable extraction of momentum-space observables from real-space single- shot images and vice versa. This obviates the need for a reconfiguration of the experimental setup between in-situ and time-of-flight imaging, thus potentially granting an outstanding reduction in resources.
Preprint available at https://arXiv.org/abs/2010.14510