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Hannover 2020 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 3: Ultracold atoms, ions, and BEC I (joint session A/Q)

A 3.3: Vortrag

Montag, 9. März 2020, 11:45–12:00, f303

Tune-out and magic wavelengths for the 23Na40K molecule — •Roman Bause1, Xing-Yan Chen1, Andreas Schindewolf1, Ming Li2, Marcel Duda1, Svetlana Kotochigova2, Immanuel Bloch1,3, and Xin-Yu Luo11Max-Planck-Institut für Quantenoptik, 85748 Garching — 2Department of Physics, Temple University, Philadelphia, Pennsylvania 19122, USA — 3Ludwig-Maximilians-Universität, 80799 München

State-dependent optical dipole traps for ultracold atoms or molecules have wide application in quantum engineering and precision measurements. One extreme case is the tune-out condition, where the light shift of one state vanishes while the other one remains finite. Another extreme case is the magic condition, where the light shifts of both states are identical. We demonstrate a versatile, rotational-state dependent optical dipole trap for the ground-state 23Na40K molecule and its first rotationally excited state. Close to a low-lying, narrow molecular transition, we experimentally determined a tune-out and a magic frequency. Because these frequencies are less than 10 GHz apart, it is possible to create both types of trap as well as any intermediate trap configuration with the same laser system and switch between them during an experimental cycle. We propose that the rotational-state dependent trap can be used for evaporative cooling of polar molecules or investigation of their collisional properties.

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