Erlangen 2018 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 62: Poster: Quantum Optics and Photonics V
Q 62.29: Poster
Donnerstag, 8. März 2018, 16:15–18:15, Redoutensaal
A 3D Optical Lattice for the Creation of a Dense, Ultracold 23Na40K Gas — •Scott Eustice1, Xin-Yu Luo1, Frauke Seeßelberg1, Immanuel Bloch1,2, and Christoph Gohle1 — 1Max-PlanckInstitut für Quantenoptik, Hans-Kopfermann-Str. 1, 85748 Garching, Germany — 2Ludwig-Maximilians-Universität, Schellingstraße 4, 80799 München, Germany
We present the implementation of a 3D optical lattice for the production and trapping of ultracold, ground state 23Na40K molecules. Dipolar molecules can explore long-range interacting physics and the implementation of a lattice allows new regimes to be entered.
NaK molecules are created by mixing samples of Na and K, creating weakly bound Feshbach molecules, and then using STIRAP to transfer the Feshbach molecules into their ground state.
Creating large samples of NaK molecules depends on achieving a near unity filling factor of the initial Na and K atomic samples. Loading the fermionic K into the lattice is expected to give an 85% filled band insulator of 40.000 atoms. Too many bosonic Na atoms leads to greater than unity fillings, preventing molecule association. The low mass of Na compared to other bosonic atoms means that a large, unity filling Mott insulator can be created. For our experiment, we expect to obtain a 95% filled Mott insulator of 40.000 Na atoms.
With these samples, we expect Feshbach association efficiency to improve from 10% to near 100% in the lattice. We expect to achieve a final sample of 25.000 ground state NaK molecules at 60% filling, a significant improvement over previous results.