Hannover 2010 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 24: Poster: Quantum Control

MO 24.1: Poster

Donnerstag, 11. März 2010, 16:00–18:30, Lichthof

Infrared Laser Driven Double Proton Transfer. An Optimal Control Theory Study — •Oliver Kühn and Mahmoud Abdel-Latif — Institut für Physik, Universität Rostock, D-18051 Rostock

Laser control of ultrafast double proton transfer is investigated for a two-dimensional model system describing stepwise and concerted transfer pathways [1]. The pulse design has been done by employing optimal control theory in combination with the multiconfiguration time-dependent Hartree wave packet propagation. The obtained laser fields correspond to multiple pump-dump pulse sequences. Special emphasis is paid to the relative importance of stepwise and concerted transfer pathways for the driven wave packet and its dependence on the parameters of the model Hamiltonian as well as on the propagation time. While stepwise transfer is dominating in all cases considered, for high barrier systems concerted transfer proceeding via tunneling can make a contribution.

[1] M. Abdel-Latif, O. Kühn, arXiv:0912.1715v1 [physics.chem-ph]