Controlled doping of a bosonic quantum gas with single neutral atoms Daniel Mayer, Felix Schmidt, Daniel Adam, Steve Haupt, Jennifer Koch, Tobias Lausch, Jens Nettersheim, Quentin Bouton and Artur Widera J. Phys. B 52, 015301 (2019) DOI:10.1088/1361-6455/aaf357 https://arxiv.org/abs/1805.01313