Heidelberg 2015 – scientific programme
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A: Fachverband Atomphysik
A 40: Ultracold Atoms and Molecules (with Q)
A 40.6: Talk
Friday, March 27, 2015, 12:15–12:30, B/SR
Photoassociation spectroscopy of an ultra cold 23Na-40K mixture: En route to many-body physics with polar molecules — •Zhenkai Lu1, Nikolaus Buchheim1, Frauke Seesselberg1, Tobias Schneider1, Immanuel Bloch1,2, and Christoph Gohle1 — 1Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, 85748 Garching, Germany — 2Ludwig-Maximilians-Universität, Schellingstraße 4, 80799 München, Germany
Ultra cold quantum gases with long-range dipolar interaction promise exciting new possibilities for quantum simulation of strongly interacting many-body systems. One way of realizing this is to create an ultra cold sample of ground state polar molecules.
A crucial step is the stimulated Raman adiabatic passage (STIRAP), a two-photon process involving a resonant intermediate state. We identified promising candidates for this intermediate level in the molecular potentials of the sodium D-line asymptote. We observe a series of deeply bound vibrational levels, resolving fine and hyperfine structure, by photoassociation spectroscopy on a nearly degenerate mixture of 23Na and 40K. By applying external fields, we observe Zeeman and Stark sub structure.