Single-particle dynamics of the Anderson model: a two-self-energy description within the numerical renormalization group approach

Thumbnail Image

Date

Authors

Journal Title

Journal ISSN

Volume Title

Publisher

Abstract

Description

Single-particle dynamics of the Anderson impurity model are studied using both the numerical renormalization group (NRG) method and the local moment approach (LMA). It is shown that a 'two-self-energy' description of dynamics inherent to the LMA, as well as a conventional 'single-self-energy' description, arise within NRG; each yielding correctly the same local single-particle spectrum. Explicit NRG results are obtained for the broken symmetry spectral constituents arising in a two-self-energy description, and the total spectrum. These are also compared to analytical results obtained from the LMA as implemented in practice. Very good agreement between the two is found, essentially on all relevant energy scales from the high-energy Hubbard satellites to the low-energy Kondo resonance.
12 pages, 6 figures

Keywords

Strongly Correlated Electrons

Citation

URI

http://salesiana.dossiersoluciones.com/handle/123456789/104353

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0511698
 http://arxiv.org/abs/cond-mat/0511698
 J. Phys.: Condens. Matter 17, 6959 (2005)
 doi:10.1088/0953-8984/17/43/013

Collections

arXiv