Rostock 2019 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 20: Cold Molecules (joint session MO/A)
A 20.4: Vortrag
Mittwoch, 13. März 2019, 14:45–15:00, S HS 002 Biologie
Ultracold 23Na40K Ground-State Molecules in a 3D Optical Lattice — •Marcel Duda1, Roman Bause1, Scott Eustice1, Frauke Seeßelberg1, Xing-Yan Chen1, Christoph Gohle1, Immanuel Bloch1,2, and Xin-Yu Luo1 — 1Max-Planck Institut für Quantenoptik, Hans-Kopfermann-Str. 1, 85748 Garching, Germany — 2Ludwig-Maximilians-Universität, Schellingstraße 4, 80799 München, Germany
Ultracold polar molecules represent an interesting platform to study quantum many-body physics. In contrast to atoms, molecules exhibit a rich rotational and vibrational structure. Additionally, ground-state molecules have a strong permanent electric dipole moment which allows the investigation of spin models beyond nearest-neighbor interactions. In this talk, we will report on the progress of creating a fermionic low entropy gas of 23Na40K ground-state molecules in a three-dimensional optical lattice.
After loading an ultracold mixture of 23Na and 40K atoms into the 3D lattice, we produce NaK molecules in the rotational-vibrational ground-state by associating Feshbach molecules from atoms followed by stimulated Raman adiabatic passage. We observe a significantly extended lifetime of NaK molecules in the 3D optical lattice and anticipate an improved Feshbach molecule association efficiency.
With sufficiently high filling and lifetimes of the ground-state NaK molecules in the 3D lattice, it is possible to observe intriguing spin dynamics such as condensate of rotational excitations or anisotropic propagation of spin waves.