Tecnicas de renormalização aplicadas ao estudo da densidade de estados de sistemas desordenados

AUTOR(ES)
DATA DE PUBLICAÇÃO

1985

RESUMO

A general scheme for real space renormalization of formal scattering theory is presented and applied to the calculation of density of states (DOS) in some finite width systems. This technique is extended in a self-consistent way, to the treatment of disordered and partially ordered chains. Numerical results of moments and DOS are presented in comparison with previous calculations. In addition, a self-consistent theory for the magnetic order problem in a Hubbard chain is derived and a parametric transition is observed. Properties of localization of the electron studied through various decimation averaging techniques and using numerical simulations.

ASSUNTO(S)

renormalização (fisica)

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