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  • Dropping an impurity into a Chern insulator: A polaron view on topological matter 

    Camacho-Guardián, Arturo; Goldman, Nathan; Massignan, Pietro Alberto; Bruun, Georg M. (American Physical Society (APS), 2019-02-05)
    Article
    Open Access
    We investigate the properties of an impurity particle interacting with a Fermi gas in a Cherninsulating state. The interaction leads to the formation of an exotic polaron, which consists of a coherent superposition of the ...
  • Strong-coupling ansatz for the one-dimensional Fermi gas in a harmonic potential 

    Levinsen, Jesper; Massignan, Pietro; Bruun, Georg M.; Parish, Meera M. (Science, 2015-07-24)
    Article
    Open Access
    A major challenge in modern physics is to accurately describe strongly interacting quantum many-body systems. One-dimensional systems provide fundamental insights because they are often amenable to exact methods. However, ...