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20 février 2020: 1 événement

séminaire

  • Symmetry-based indicators for topological Bogoliubov-de Gennes Hamiltonians

    Jeudi 20 février 11:00-12:00 - Max Geier - Dahlem Center for Complex Quantum Systems and Physics Department, Freie Universität Berlin

    Symmetry-based indicators for topological Bogoliubov-de Gennes Hamiltonians

    Résumé : We develop a systematic approach for constructing symmetry-based
    indicators of a topological classification for superconducting systems.
    The topological invariants constructed in this work form a complete set
    of symmetry-based indicators that can be computed from knowledge of the
    Bogoliubov-de Gennes Hamiltonian on high-symmetry points in Brillouin
    zone. After excluding topological invariants corresponding to the phases
    without boundary signatures, we arrive at a natural generalization of
    symmetry-based indicators [1] to Hamiltonians of Bogoliubov-de Gennes type.
    [1] H. C. Po, A. Vishwanath, and H. Watanabe, Nature Comm. 8, 50 (2017).

    Lieu : Moyen amphi, bat 510, LPS

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