Journal
JOURNAL OF PHYSICS-CONDENSED MATTER
Volume 16, Issue 4, Pages 613-625Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0953-8984/16/4/010
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A dynamic density-matrix renormalization 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 discretization of the host band hybridized with the impurity and the resolution of sharp spectral features such as the AbrikosovSuhl resonance.
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