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Showing 1–4 of 4 results
Advanced filters: Author: F. Nur Ünal Clear advanced filters

  • The connection between the topological properties of the ground state and non-equilibrium dynamics remains obscure. Here, Tarnowski et al. define and measure a linking number between static and dynamical vortices, which directly corresponds to the ground-state Chern number.

    • Matthias Tarnowski
    • F. Nur Ünal
    • Christof Weitenberg
    ResearchOpen Access
    Nature Communications
    Volume: 10, P: 1-13

  • R.-J. Slager et al. extend the theory of multigap topology from static to non-equilibrium systems. They identify Floquet-induced non-Abelian braiding, resulting in a phase characterized by anomalous Euler class, a multi-gap topological invariant. They also find a gapped anomalous Dirac string phase. Both phases have no static counterparts and exhibit distinct boundary signatures.

    • Robert-Jan Slager
    • Adrien Bouhon
    • F. Nur Ünal
    ResearchOpen Access
    Nature Communications
    Volume: 15, P: 1-11

  • Standard topological invariants commonly used in static systems are not enough to fully capture the topological properties of Floquet systems. In a periodically driven quantum gas, chiral edge modes emerge despite all Chern numbers being equal to zero.

    • Karen Wintersperger
    • Christoph Braun
    • Monika Aidelsburger
    Research
    Nature Physics
    Volume: 16, P: 1058-1063

  • Topological insulators exhibit unidirectional flow of robust electric charge at the edge of the system. Two recent experiments have observed these chiral edge modes in exceptionally controllable settings of ultracold atoms.

    • Luca Asteria
    • F. Nur Ünal
    News & Views
    Nature Physics
    Volume: 20, P: 1692-1693