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Q: Fachverband Quantenoptik und Photonik

Q 59: Poster IV

Q 59.24: Poster

Donnerstag, 9. März 2023, 16:30–19:00, Empore Lichthof

Matter-Wave optics with time-averaged potentials and tunable interactions — •Henning Albers¹, Alexander Herbst¹, Wei Liu¹, Dorothee Tell¹, Ernst M. Rasel¹, Dennis Schlippert¹, and The PRIMUS-Team² — ¹Leibniz Universität Hannover, Institut für Quantenoptik — ²ZARM, Universität Bremen

The performance of matter-wave sensors highly depends on the center-of-mass motion and the expansion rate of the atomic ensemble. Time-averaged optical dipole traps give rise to nearly arbitrary dynamic potentials. Alongside with magnetic traps, such as those used in atom chip traps, they can provide fast Bose-Einstein condensate production. Here time-averaged potentials overcome the limitations of typical dipole traps by conserving the trap frequencies during evaporative cooling. The all-optical approach additionally allows to tune the atomic interactions by means of magnetic Feshbach resonances.
We discuss our latest results of combining dynamic optical potentials with tunable interactions when performing evaporative cooling [1] as well as applying all-optical matter-wave lenses [2].

[1] A. Herbst et al., PRA (2022): Rapid generation of all-optical ³⁹K Bose-Einstein condensates using a low-field Feshbach resonance
[2] H. Albers et al., CommPhys (2022): All-optical matter-wave lens using time-averaged potentials