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Q: Fachverband Quantenoptik und Photonik
Q 42: Ultracold atoms, ions, and BEC V (joint session A/Q)
Q 42.2: Vortrag
Donnerstag, 12. März 2020, 11:30–11:45, f303
Precision Spectroscopy of an Interacting Ytterbium Fermi-Fermi Mixture — •Benjamin Abeln1, Marcel Diem1, Koen Sponselee1, Nejira Pintul1, Klaus Sengstock1,2, and Christoph Becker1,2 — 1Center for Optical Quantum Technologies, University of Hamburg, Luruper Chaussee 149, 22761 Hamburg — 2Institute for Laserphysics, University of Hamburg, Luruper Chaussee 149, 22761 Hamburg
We perform high precision spectroscopy on the 1S0 to 3P0 clock transition of 171Yb and 173Yb to investigate interactions in an ultracold Fermi-Fermi mixture of 171Yb and 173Yb. We find and characterize an SU(2) × SU(6) symmetric interspecies interorbital interaction. The Yb Fermi-Fermi mixture in the ground state is characterized by strongly attractive inter-species interactions, while the intra-species interactions are vanishing for 171Yb and repulsive for 173Yb. We discuss prospects of spectroscopic methods to gain information on the underlying many-body phase diagram.