Density-matrix renormalisation group approach to quantum impurity problems

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A dynamic density-matrix renormalisation group approach to the spectral properties of quantum impurity problems is presented. The method is demonstrated on the spectral density of the flat-band symmetric single-impurity Anderson model. We show that this approach provides the impurity spectral density for all frequencies and coupling strengths. In particular, Hubbard satellites at high energy can be obtained with a good resolution. The main difficulties are the necessary discretisation of the host band hybridised with the impurity and the resolution of sharp spectral features such as the Abrikosov-Suhl resonance.
16 pages, 6 figures, submitted to Journal of Physics: Condensed Matter

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Strongly Correlated Electrons

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http://salesiana.dossiersoluciones.com/handle/123456789/22675

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0311291
 http://arxiv.org/abs/cond-mat/0311291
 J. Phys.: Condens. Matter 16 (2004) 613-625.
 doi:10.1088/0953-8984/16/4/010

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