Dresden 2011 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
Q: Fachverband Quantenoptik und Photonik
Q 3: Cold Molecules 1
Q 3.8: Vortrag
Montag, 14. März 2011, 12:15–12:30, BAR Schön
Controlling a Shape Resonance with Non-resonant Laser Light — •Ruzin Aganoglu1, Mikhail Lemeshko2, Bretislav Friedrich2, Rosario González-Férez3, and Christiane P. Koch1,4 — 1Freie Universität Berlin, Institut für Theoretische Physik — 2Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin — 3Universidad de Granada, Facultad de Ciencias, Spain — 4Universität Kassel, Institut für Physik
A shape resonance is a metastable state that arises from trapping of a part of the scattering wavefunction by the centrifugal barrier. It corresponds to an enhanced pair density of atoms at short internuclear separations, which can be useful for making molecules from atom pairs. For atoms confined in an atom trap, the pair density will be enhanced if the energy width of the resonance matches the atom trap temperature. Herein, we seek to control the energy of a shape resonance by making use of non-resonant laser light. Nonresonant light couples to the polarizability anisotropy of an atom pair and thereby modifies its rotational and vibrational states. We study the effect on the pair density of rubidium and strontium atoms as a function of the pulse duration and intensity of the nonresonant light.