Listar Teses e dissertações por autor "f549ac53-9f7f-4d43-b8d4-2939a1c44d00"
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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 ...