https://phys.org/news/2019-07-scientists-unveil-first-ever-image-quantum.html
Imaging Bell-type nonlocal behavior
Paul-Antoine Moreau*,
Ermes Toninelli,
Thomas Gregory,
Reuben S. Aspden,
Peter A. Morris and
Miles J. Padgett
https://advances.sciencemag.org/content/5/7/eaaw2563