By: Igor Ivanov
From: IFPA, Universite de Liege, Belgium and Sobolev Institute of Mathematics, Russia
At: Instituto de Investigação Interdisciplinar, B1-01
Vortex states refer to freely propagating wavepackets with helical wavefronts, which carry a non-zero orbital angular momentum with respect to the propagation direction. In optics, photon vortex states have been known and routinely used since decades. Recently, several groups experimentally created vortex electrons and started to explore the physics opportunities they offer. Producing vortex states of protons and other particles should also be feasible. I will briefly review the recent experimental progress, and then give examples of physical problems, both within particle physics and beyond, where the vortex states of charged particles can have an impact.