• Estudo de transições de fases quânticas em modelos de spin unidimensionais 

      Leiva, Marcos César Amor Pérez (2018) [Tese]
      In this thesis we address the subject of quantum phase transitions within the context of spin liquids using two di erent models and two theoretical approaches. The eld of quantum phase transitions is quite vast and for ...
    • Topological properties of BDI class condensed systems 

      Widniczck, Pedro Barbisan (2023) [Dissertação]
      In this dissertation, topological properties of quantum mechanical non-interacting condensed matter systems are reviewed. Firstly, the formalism of the topological band theory is developed, by defining one of the principal ...