Seminar

des DFG-Sonderforschungsbereichs 393

Numerische Simulation auf massiv parallelen Rechnern

Zeit:	Freitag, 19.01.2001, 11:45 Uhr
Ort:	Reichenhainer Straße 70, B 202
Vortragender:	Andreas Buchleitner (Nonlinear Dynamics in Quantum Systems, MPI für komplexe Systeme Dresden)
Thema:	Chaotic ionization of non-classical alkali Rydberg states - Computational Physics meets experiment
Highly excited atoms ('Rydberg atoms') exposed to strong electromagnetic fields are perfect micro-laboratories to study fundamental effects of coherent quantum transport in disordered or classically chaotic systems (such as Anderson localization, chaos assisted tunneling, or conductance fluctuations). However, due to the complexity of their spectral structure involving mutliply degenerate continua and, possibly, quantum scattering off a multielectron core, these objects remained so far unaccessible to a rigourous theoretical/numerical treatment. We report on the first ab initio quantum treatment of this problem, with the help of the currently largest, massively parallel supercomputer available in the academic realm, the Hitachi SR8000-F1 of the Leibniz-Rechenzentrum der Bayerischen Akademie der Wissenschaften. The talk will discuss basic aspects of the numerical treatment, and touch upon some longstanding questions on the atomic ionization dynamics, in the light of the direct comparison between laboratory and numerical experiments.
Das Seminar wird von Prof. Schreiber geleitet. Interessenten sind herzlich eingeladen.