Browsing Teses e dissertações by Author "f549ac53-9f7f-4d43-b8d4-2939a1c44d00"

Now showing items 1-2 of 2

    • Ultracold bosons in random lattice potentials 

      Souza, Renan da Silva (Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Física - PPGF, Câmpus São Carlos, 06/04/2023)
      The Bose-Hubbard model describes short-range interacting spinless bosons on a random lattice. This model is realized in ultracold atomic systems where quantum phase transitions can be observed. When loaded into a deep ...

    • Effective-action approach to dirty bosons in optical lattices 

      Souza, Renan da Silva (Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Física - PPGF, Câmpus São Carlos, 21/02/2019)
      A system of cold bosonic atoms loaded in an optical lattice potential can undergo a macroscopic phase transition due to quantum fluctuations. As the depth of the lattice potential is increased, the ground state of the ...