Regensburg 2007 – scientific programme

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O: Fachverband Oberflächenphysik

O 52: Methods: Atomic and Electronic Structure II

O 52.3: Talk

Thursday, March 29, 2007, 11:45–12:00, H42

Control of dissipative quantum systems — •Erik Asplund and Thorsten Klüner — Institute of Pure and Applied Chemistry, Carl v. Ozzietsky University Oldenburg, Germany

Light interacting with atoms and molecules is not only a source of information about the atoms and molecules studied, it can also initiate charge and energy transfer processes, i.e. chemical reactions. The ability to control quantum systems interacting with their environment and light is investigated. A quantum system interacting with the environment can be separated into a primary system and a bath. This can be done within the framework of the Surrogate Hamiltonian approach [1]. Optimal control theory (OCT) provides a tool to active control of quantum dynamical systems [2]. To gain control of a dissipative system, OCT is combined with the Surrogate Hamiltonian method. It is shown that an effective control of a dissipative system is possible. Theoretical quantum calculations on the benchmark system NO/NiO(100) are provided to illustrate this combined approach and the results are compared with previous studies [3,4].

[1] Roi Baer, and Ronnie Kosloff, J. Chem. Phys. 106, 8862 (1997). [2] Wusheng Zhu, Jair Botina, and Herschel Rabitz, J. Chem. Phys. 108, 1953 (1997). [3] Christiane P. Koch, Thorsten Klüner, Hans-Joachim Freund, and Ronnie Kosloff, J. Chem. Phys. 119,1750 (2003). [4] Sören Dittrich, Hans-Joachim Freund, Christiane P. Koch, Ronnie Kosloff, and Thorsten Klüner, J. Chem. Phys. 124, 024702 (2006).