Dr. Donnie Keathley and John Simonaitis reviewed a double-submission of papers on using coulombic effects for electron heralding for Nature Physics, and were invited to write a News and Views article for the general public. The complete article can be found here.

Abstract:
Two studies of electrons generated from laser-triggered emitters have found highly predictable electron–electron energy correlations. These studies, at vastly different energy scales, may lead to heralded electron sources, enabling quantum free-electron optics and low-noise, low-damage electron beam lithography and microscopy.

A schematic of the two experiments, showing the underlying mechanism and detection schemes.