• Correlacões quânticas: medidas e simetrias 

      Souza, Simone Ferreira (Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Física - PPGF, , 17/06/2011)
      In this thesis, we explore two sort of quantum correlations: entanglement and quantum discord. We present a geometric method to identify and measure the degree of entanglement based on symmetries of vectors and matrices ...
    • Geometria e simetrias do emaranhamento 

      Braga, Helena Carolina (Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Física - PPGF, , 20/05/2011)
      In the present work we present a geometric method to identify and measure the degree of entanglement of a two-qubit state. It is based on writing a map of the system state, from a non-unitary transformation. By introducing ...