Dresden 2011 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
MO: Fachverband Molekülphysik
MO 3: Cold Molecules I
MO 3.8: Talk
Monday, March 14, 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.