First measurement of entangled states in nitrogen

What was the initial location of the electron before it was ejected from the dumbbell-shaped nitrogen molecule by a high-energy photon (blue)? The diagram shows the probability distribution of the photo-electron in the case of its prior localization (left), or for the Auger electron (right). As both electrons form an entangled state, the Auger electron is also localized. Credit: Markus Schoeffler