• Diagrammatic expansions of Hubbard models 

    Losada Sosnovsky, Juan Manuel (Universitat Politècnica de Catalunya, 2016-06-19)
    Trabajo final de grado
    Acceso abierto
    Optical lattice are periodic structures made of light, they are formed by the interference of laser beams producing standing waves. The depth and the periodicity of the optical lattice can be highly controlled, therefore, ...
  • Dynamics of Many-Body Quantum Systems 

    Giménez Grau, Aleix (Universitat Politècnica de Catalunya, 2015-07-03)
    Trabajo final de grado
    Acceso abierto
    We study the ground state and the excitations of quantum bose systems. The hypernetted chain equations (HNC) are introduced and we show that the methods based on them produce acceptable approximations of the static structure ...
  • Microscopic description of confined bosonic dipolar quantum gases in two dimensions 

    Sánchez Baena, Juan (Universitat Politècnica de Catalunya, 2015-06-21)
    Trabajo final de grado
    Acceso abierto
    We present a microscopic description of the two dimensional quantum few body problem involving confined polarized bosons. Due to anisotropy of the dipolar interaction, the system presents an interesting behaviour in terms ...
  • Microscopic description of two dimensional dipolar quantum gases 

    Macía Rey, Adrián (Universitat Politècnica de Catalunya, 2015-02-13)
    Tesis
    Acceso abierto
    A microscopic description of the many-body properties of anisotropic homogeneous gases of bosonic dipoles in two dimensions is presented and discussed. By changing the polarization angle with respect to the plane, we study ...