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Renormalization-group calculation of excitation properties for impurity models

Physical Review B, ISSN: 0163-1829, Vol: 41, Issue: 13, Page: 9403-9414
1990
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The 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. © 1990 The American Physical Society.

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