Hannover 2010 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 13: Interaction with Strong or Short Laser Pulses I
A 13.2: Vortrag
Mittwoch, 10. März 2010, 14:30–14:45, F 107
Study of electron-nuclear correlation using the multi-configuration time-dependent Hartree approach — •Chirag Jhala and Manfred Lein — Centre for Quantum Engineering and Space-Time Research (QUEST) and Institut für Theoretische Physik, Leibniz Universität Hannover, Appelstraße 2, 30167 Hannover, Germany.
The multi-configuration time-dependent Hartree (MCTDH) approach [1] is a well known tool to study the nuclear dynamics in multi-dimensional systems. The extension of the MCTDH approach to study multi-electron dynamics is known as the multi-configuration time-dependent Hartree Fock (MCTDHF) approach. We propose to use the MCTDH approach to study the correlated electron-nuclear dynamics in H2+ and H2 model systems driven by strong laser pulses. We evaluate various observables, e.g. high-harmonic generation (HHG) spectra, frequency-time analysis, fragmentation and survival probabilities and time-dependent densities, to compare the performance of MCTDH approach with the exact calculation. We demonstrate that the performance of MCTDH approach converges towards the exact results with increasing number of configurations and that a moderate number of configurations is sufficient to yield reliable results.
[1] M. H. Beck, A. Jäckle, G. A. Worth and H.-D. Meyer, Physics Reports 324, 1 (2000).