University of Hertfordshire researcher Ole Steuernagel works on theoretical optics and ‘Wigner flow’.
In 2012 he was investigating intensity helices of light, you can read the full article for more information.
There has been media interest in a 2010 collaboration between Steuernagel and Daniel Polani on How to kill persistent bugs.
Work on Wigner current J is in collaboration with Dimitris Kakofengitis and Georg Ritter, establishes the quantum analog of classical particle flow along phase portrait lines.
The video illustrates topological charge conservation in the system that were studied.