Mainz 2026 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 37: Ultra-cold Atoms, Ions and BEC II (joint session A/Q)
Q 37.5: Talk
Wednesday, March 4, 2026, 15:45–16:00, N 1
Ultracold mixture of erbium and lithium atoms — •Kirill Karpov, Alexandre De Martino, Florian Kiesel, Jonas Auch, Eduard Heidt, and Christian Gross — Eberhard Karls Universitaet Tuebingen, Tuebingen, Germany
The extreme mass imbalance between Er and Li offers a unique platform for exploring impurity physics and emergent many-body phenomena. In this experiment, we produce a mixture of 166Er and 6Li. We achieve Bose-Einstein condensation for erbium via evaporative cooling, while lithium is sympathetically cooled by the erbium. Furthermore, the tune-out wavelength of Er enables species-selective confinement. This allows for the far-detuned conservative trapping of Li without perturbing the Er background. Such species-selective trapping schemes open a new level of control in mixture experiments, paving the way for studying the properties of moving Bose polarons.
Keywords: quantum gases; ultracold atoms; bose polaron