Rostock 2019 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 10: Posters 1: Cold Molecules, High Resolution Spectroscopy, and Theory
MO 10.1: Poster
Dienstag, 12. März 2019, 16:30–18:30, S Foyer LLM
A narrow-line rotational-state-dependent dipole trap for ultracold polar molecules — •Xing-Yan Chen1, Roman Bause1, Ming Li2, Scott Eustice1, Marcel Duda1, Frauke Seeßelberg1, Svetlana Kotochigova2, Immanuel Bloch1,3, and Xin-Yu Luo1 — 1Max-PlanckInstitut für Quantenoptik, Hans-Kopfermann-Str. 1, 85748 Garching, Germany — 2Department of Physics, Temple University, Philadelphia, PA 19122-6082, USA — 3Ludwig-Maximilians-Universität, Schellingstraße 4, 80799 München, Germany
Ultracold polar molecules in rotational states with opposite parities offer strong dipole-dipole interaction, thus can be used to encode pseudo-spin and simulate spin models with long-range interactions. We demonstrate a rotational-state-dependent dipole trap for ultracold 23Na40K molecules by utilizing a narrow-line rotational transition manifold |X1 Σ+, v= 0, J=0,1⟩ → |b3 Π, v=0, J=0,1,2⟩. By selecting an appropriate laser detuning, we are able to make a "magic" trap where the polarizabilities of |J=0, 1⟩ states are the same, an "anti-magic" trap where the polarizabilities are exactly opposite, or a tune-out trap where the polarizability of one of the rotational states vanishes. Further more, thanks to the narrow natural linewidth of the excited |b3 Π0+, v=0⟩ state, the photon-scattering of the tune-out trap is negligible. A long-lived universal spin-dependent dipole potential will facilitate novel studies of spin models and many-body localization with ultracold polar molecules.