Bulletin of the American Physical Society
2023 APS March Meeting
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session D24: Floquet engineering of 2D materials
3:00 PM–6:00 PM,
Monday, March 6, 2023
Room: Room 237
Sponsoring
Unit:
DCMP
Chair: Mohsen Yarmohammadi, University of Texas at Dallas
Abstract: D24.00005 : Observing edge dynamics in topological Floquet systems
5:24 PM–6:00 PM
Presenter:
Christoph Braun
(LMU Munich)
Authors:
Christoph Braun
(LMU Munich)
Raphaël Saint-Jalm
(Ludwig-Maximilians-Universität)
Alexander C Hesse
(Ludwig-Maximilians-University Munich (LMU Munich))
Johannes Arceri
(Ludwig-Maximilians-Universität)
Immanuel Bloch
(Max Planck Institute for Quantum Optics)
Monika Aidelsburger
(Ludwig-Maximilians-Universitaet (LMU-Munich))
.
Our experimental system consists of bosonic atoms in a periodically driven honeycomb lattice.
Depending on the driving parameters several out-of-equilibrium topological phases can be realized,
including an anomalous phase [2]. Recently, we have added programmable optical potentials to study
the edge dynamics in such topological systems. We are investigating the real-space evolution of an initially
localized wavepacket close to the edge after releasing it from a tightly-focused optical tweezer. We observe the chiral
nature of the edge state, even in the anomalous Floquet phase, thereby directly revealing the topological nature of this phase.
[1] Rudner, et al. Anomalous edge states and the bulk-edge correspondence for periodically-driven two dimensional systems, Phys. Rev. X 3, 031005 (2013)
[2] Wintersperger, et al. Realization of an anomalous Floquet topological system with ultracold atoms. Nat. Phys. 16, 1058–1063 (2020)
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