Bulletin of the American Physical Society
54th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 68, Number 7
Monday–Friday, June 5–9, 2023; Spokane, Washington
Session Q08: Dynamics of Cold Atoms in Optical Lattices
8:00 AM–10:00 AM,
Thursday, June 8, 2023
Room: 206 C
Chair: Dominik Schneble, Stony Brook
Abstract: Q08.00002 : Time-resolved measurements of the anomalous Hall velocity*
8:12 AM–8:24 AM
Withdrawn
Presenter:
Alexander Ilin
(Institute for Laser Physics, University of Hamburg)
Authors:
Alexander Ilin
(Institute for Laser Physics, University of Hamburg)
Klaus Sengstock
(Institute for Laser Physics, University of Hamburg)
Juliette Simonet
(Intitute for Laser Physics, University of Hamburg)
Here, we report on direct measurements of the anomalous Hall velocity for bosonic superfluids in an accelerated optical boron-nitride lattice. By tracing the coherent evolution of Bloch states in momentum space, we precisely extract the time-dependent anomalous velocity along different paths in reciprocal space and infer the associated local Berry curvature. Using this method, we demonstrate geometric pumping and a bosonic counterpart of the valley Hall effect for condensates in the second Bloch band, where atoms in different valleys experience net anomalous transport in opposite directions.
*We acknowledge funding by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) within SFB-925 project 170620586
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