20.05.2026 Felix Palm (Université Libre de Bruxelles)
Location: HIT E 41.1, Time: 12:00
Quantum Hall states in optical lattices: Revealing hidden long-range order
Studying quantum Hall states and their exotic anyonic excitations poses an ongoing challenge both for theory and experiments. Quantum simulatorsÔÇölike cold atoms in optical latticesÔÇöprovide a promising platform to realize, manipulate, and understand such states on a microscopic level.
In this talk, after a brief overview of the field, I will highlight how local resolution sheds light on exciting questions. I will exemplify this by offering a somewhat unorthodox view on the topological order of quantum Hall states: the speculated condensation of composite bosons and their long-range order. We will encounter this hidden order in bosonic [1] and fermionic [2] systems and will touch upon its detectability in tensor network simulations and quantum gas microscopes.
[1] Pauw, FP et al., Detecting Hidden Order in Fractional Chern Insulators; PRR 6, 023180 (2024)
[2] Pauw, …, FP, From hidden order to skyrmions: Quantum Hall states in an extended Hofstadter-Fermi-Hubbard model; PRB 113, 035142 (2026)