Berlin 2018 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

TT: Fachverband Tiefe Temperaturen

TT 31: Dynamics in Many-Body Systems: Interference, Equilibration and Localization II (joint session DY/TT)

TT 31.6: Vortrag

Montag, 12. März 2018, 16:45–17:00, EB 107

Formation of Few-Electron-Complexes — •Hubert Klar — Univ. Freiburg

Systems of 2,3 or 4 electrons in the field of a nucleus are shown to posses unstable equilibrium configurations. The many-body potential energy surface has in such configurations saddle points. AS model we study a saddle point with only one fragmentation direction, and show that the diffraction of an electron wave from the corresponding potential ridge manifests itself as a novel fictitious force being temporarily attractive between electrons. Moreover that force deforms the static potential surface and predicts an energy gap. Our theory extends and translates Wannier classical ionization theory into quantum mechanics. In contrast to Cooper pairs our electronic binding mechanisme stems entirely from correlation rather than fom lattice vibrations.