SAMOP 2023 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
Q: Fachverband Quantenoptik und Photonik
Q 22: Poster II
Q 22.32: Poster
Dienstag, 7. März 2023, 16:30–19:00, Empore Lichthof
Observation of Chiral Edge Current Suppression for Strongly Interacting Fermions in Hall Ladder Systems — •Marcel Diem1, Tobias Petersen1, Nejira Pintul1, Benjamin Abeln1, Koen Sponselee1, Oscar Murzewitz1, 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
Ultracold quantum gases of neutral atoms are an excellent platform for quantum simulation of Hall physics due to their ability to implement artificial gauge fields and, thus, to mimic the physics of charged particles in strong magnetic fields.
Here, we present the experimental realization of 2D Hall ladder systems in one real and one synthetic dimension and study edge currents for two ultracold fermionic ytterbium isotopes to access the role of interactions in topologically non-trivial systems. One isotope, 171Yb, is non-interacting, whereas the isotope 173Yb interacts repulsively. We use Raman beams to couple states with different mF quantum number and momentum. This coupling gives rise to a strong artificial magnetic field, which is essential for the quantum Hall effect.
We observe a significant suppression of chiral edge currents for strongly interacting fermions in direct comparison to non-interacting fermions. Our work paves the way towards a better understanding of interaction effects in Hall systems.