Bonn 2025 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 72: Ultra-cold Atoms, Ions and BEC V (joint session A/Q)
Q 72.1: Talk
Friday, March 14, 2025, 11:00–11:15, GrHS Mathe
Interplay of topology and disorder in driven honeycomb lattices — Alexander Hesse1,2,3, Johannes Arceri1,2,3, •Moritz Hornung1,2,3, Christoph Braun1,2,3, and Monika Aidelsburger1,2,3 — 1Ludwig-Maximilians-Universitä Fakultät für Physik, München, Germany — 2Munich Center for Quantum Science and Technology (MCQST), München, Germany — 3Max-Planck-Institut für Quantenoptik, Garching, Germany
One of the most fascinating properties of topological phases of matter is their robustness to disorder [1]. While various methods have been developed to probe the geometric properties of Bloch bands with ultracold atoms [2], most fail in the presence of disorder due to their reliance on translational invariance. Here, we demonstrate that topological edge modes can be employed to detect a disorder-induced phase transition between distinct topological phases in a Floquet-engineered 2D optical honeycomb lattice.
[1] J. Zheng, et al., Floquet top. phase transitions, Phys. Rev. B (2024)
[2] N. R. Cooper, J. Dalibard, and I. B. Spielman, Topological bands, Rev. Mod. Phys. (2019)
Keywords: optical honeycomb lattice; floquet; topology; edge states; disorder