Hannover 2016 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
A: Fachverband Atomphysik
A 16: Collisions, scattering and correlation phenomena II
A 16.5: Vortrag
Dienstag, 1. März 2016, 15:45–16:00, f142
Laser-driven relativistic charged and neutral twisted matter waves — •Armen Hayrapetyan1 and Jörg Götte2 — 1Max-Planck-Institut für Physik komplexer Systeme, Dresden, Germany — 2School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, U.K.
With an advent of improved instrumentation it has recently become possible to generate vortex beams of electrons and neutrons. These new types of waves propagate with twisted wavefronts and carry a non-zero topological charge resulting in a vortex-type distribution of beams' profile. In this work, we explore how the profile of such charged and neutral matter waves can be controlled and manipulated by means of intense laser fields. For this purpose, we develop an exact relativistic quantum theory by constructing Bessel-type solutions to generalized Dirac equations that describe the interaction of charged and neutral spin-half fermions with electromagnetic fields. Given the different mechanisms for the ``minimal coupling'' scheme of charged and neutral particles with external fields, we discuss the similarities and peculiar differences between laser-driven twisted electrons and neutrons.