Luis Aina, Alfredo2023-06-202023-06-202007-05-071050-294710.1103/PhysRevA.75.053806https://hdl.handle.net/20.500.14352/51492©2007 The American Physical Society. A.L. acknowledges support from Project No. FIS2004-01814 of the Spanish Dirección General de Investigación del Ministerio de Educación y Ciencia and Project No. PR1-A/07-15378 of the Universidad Complutense.We address a quantitative determination of the degree of polarization of type-II unpolarized light via the computation of the distance between the polarization distribution and the uniform distribution associated with fully unpolarized light (i.e., type-I unpolarized light or natural light). We determine the maximum degree of polarization for type-II unpolarized light and the states reaching it. We show that the degree of polarization can be arbitrarily large, approaching complete polarization for increasing mean photon numbers.engjournal articlehttp://dx.doi.org/10.1103/PhysRevA.75.053806http://journals.aps.org/open access535Kullback relative entropyWigner functionOptical wavesPhase-spaceGaussian fluctuationsQuantum localizationNonclassical statesCoherent statesUncertaintyFieldsÓptica (Física)2209.19 Óptica Física