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TT: Tiefe Temperaturen

TT 11: Postersitzung II (Metall-Isolator-Überg
änge, Phasenüberg
änge in Quantensystemen, Theorie: Systeme korrelierter Elektronen)

TT 11.38: Poster

Dienstag, 25. März 2003, 14:30–19:00, P2c, P2d

Dynamical density-matrix renormalization-group method forcalculating spectral functions of impurity models. — •Satoshi Nishimoto, Eric Jeckelmann, and Florian Gebhard — Philipps-Universität, FB Physik, 35032 Marburg

We present a new numerical method for calculating zero-temperature dynamical correlation functions in impurity models. The method is based on the dynamical density-matrix renormalization group[1]. It allows one to calculate spectral functions for all frequencies with great accuracy and good resolution. The approach is demonstrated on the single-impurity Anderson model. It can be readily extended to different models with several impurities or to the calculation of other dynamical properties.

[1] E. Jeckelmann, Phys. Rev. B 66, 045114 (2002)