Bonn 2025 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 50: Ultracold Matter (Fermions) I (joint session Q/A)

Q 50.1: Vortrag

Donnerstag, 13. März 2025, 11:00–11:15, HS V

Erbium-Lithium: towards a new quantum mixture experiment — Alexandre De Martino, Kiesel Florian, Karpov Kirill, •Jonas Auch, and Christian Groß — University of Tübingen, Tübingen, Germany

The goal of this Erbium-Lithium mixture experiment, is to lower the current temperature limit for fermions. One key for this shall be the strong mass imbalance, as we use heavy bosonic erbium atoms as a heat reservoir for the light fermionic lithium atoms. While trapping erbium in a shallow trap at 1064 nm, we want to utilize the tuneout wavelength of erbium at 841 nm. This enables an additional, narrow trap for lithium. In addition to this cooling aspect, the combination of erbium and lithium enables polaron physics, with heavy dopants of erbium in an lithium environment.

Keywords: Sympathetic cooling; Dual-species experiment; Polarons; Degenerate fermi gas