Mainz 2026 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 27: Ultra-cold Atoms, Ions and BEC III (joint session A/Q)
A 27.5: Vortrag
Donnerstag, 5. März 2026, 12:15–12:30, N 1
Determination of the dissipative response of a circularly driven atomic erbium quantum Hall system — •Franz Richard Huybrechts1, Arif Warsi Laskar2, and Martin Weitz1 — 1University of Bonn, Germany — 2IIT Guwahati, India
Cold atomic gases are an attractive system for studying topological states and phases. We examine the dissipative response of a synthetic erbium quantum Hall system to two different circular shaking modes. The dissipative response of a quantum Hall system to such a drive is linked to the transport properties, and associated with topological states. In our experiment, the quantum Hall geometry is realised in the two-dimensional state space consisting of one spatial dimension and one synthetic dimension. The latter is encoded in the Zeeman quantum number of erbium atoms in the electronic ground state. Our measurements provide evidence for a difference in the excitation rates between left- and right-handed driving. We will report on the current status of this experiment.
Keywords: Integer quantum Hall; Circular Dichroism; Topology; Dissipation; Erbium