Yoshida, Makoto [UNESP]Whitaker, Marisa AndreataOliveira, Luiz Nunes de2014-05-202014-05-201990-05-01Physical Review B. College Pk: American Physical Society, v. 41, n. 13, p. 9403-9414, 1990.0163-1829http://hdl.handle.net/11449/31058The renormalization-group method developed by Wilson to calculate thermodynamical properties of dilute magnetic alloys is generalized to allow the calculation of dynamical properties of many-body impurity Hamiltonians. As a simple illustration, the impurity spectral density for the resonant-level model (i.e., the U =0 Anderson model) is computed. As a second illustration, for the same model, the longitudinal relaxation rate for a nuclear spin coupled to the impurity is calculated as a function of temperature.9403-9414engArtigo10.1103/PhysRevB.41.9403WOS:A1990DD49500031Acesso abertoWOSA1990DD49500031.pdf00979965442938920223578007130192