There has long been a mystery when calculating how an incoming light wave scatters off an object and becomes a modified, ...

Prolate Spheroidal Wave Functions (PSWFs): Special functions optimised for representing band‐limited signals, providing an orthogonal basis with excellent time–frequency localisation.

This secret geometry of wave functions went undetected for decades. But when quantum materials began to surprise physicists with inexplicable behaviors, physicists in the 1980s realized that some of ...