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DTSTART;TZID=Europe/Paris:20260130T110000
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DTSTAMP:20260124T032613Z
CREATED:20260123T171105Z
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UID:10000022-1769770800-1769774400@sfp-alpes.fr
SUMMARY:Félix PALM (Université Libre de Bruxelles)
DESCRIPTION:Quantum Hall states in optical lattices : Revealing hidden long-range\nAbstract : \nThe study of interacting quantum Hall states and their exotic anyonic excitations poses a major challenge in current experimental and theoretical research. Quantum simulators\, in particular cold atoms in optical lattices\, provide a promising platform to realize\, manipulate\, and understand such systems with unprecedented control. In this talk\, I will discuss how the local resolution of quantum gas microscopes extends the toolbox of quantum Hall physics. To this end\, I will discuss a fundamental question regarding the topological order of quantum Hall states: the speculated condensation of composite bosons exhibiting quasi long-range order. I will exemplify this mechanism in bosonic [1] and fermionic [2] systems and touch upon its detectability in tensor network simulations and quantum gas microscopes. If time permits\, I will also touch upon the interplay of spin and charge in fermionic quantum Hall states\, resulting in ferromagnetism and skyrmionic spin-textures [2\,3]. Again\, I will present signatures to identify these states in cold-atom quantum simulators. References : [1] Pauw et al.\, Detecting Hidden Order in Fractional Chern Insulators; PRR 6 (2024)  [2] Pauw et al.\, From hidden order to skyrmions: Quantum Hall states in an extended Hofstadter-Fermi-Hubbard model; arXiv:2509.12184 (2025)  [3] Palm et al.\, Ferromagnetism and skyrmions in the Hofstadter–Fermi–Hubbard model; NJP 25 (2023) Contact : cecile.repellin@lpmmc.cnrs.fr
URL:https://sfp-alpes.fr/event/quantum-hall-states-in-optical-lattices-revealing-hidden-long-range-order/
LOCATION:LPMMC – salle Roger Maynard (G421)\, CNRS - LPMMC 25 avenue des Martyrs\, Grenoble\, 38042\, France
CATEGORIES:Séminaire
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