Generalized Numerical Renormalization Group for Dynamical Quantities

Walter Hofstetter
Phys. Rev. Lett. 85, 1508 – Published 14 August 2000
PDFExport Citation

Abstract

In this paper we introduce a new approach for calculating dynamical properties within the numerical renormalization group. It is demonstrated that the method previously used fails for the Anderson impurity in a magnetic field due to the absence of energy scale separation. The problem is solved by evaluating the Green function with respect to the reduced density matrix of the full system, leading to accurate spectra in agreement with the static magnetization. The new procedure provides a unifying framework for calculating dynamics at any temperature and represents the correct extension of Wilson's original thermodynamic calculation.

  • Received 27 April 2000

DOI:https://doi.org/10.1103/PhysRevLett.85.1508

©2000 American Physical Society

Authors & Affiliations

Walter Hofstetter

  • Theoretische Physik III, Elektronische Korrelationen und Magnetismus, Universität Augsburg, 86135 Augsburg, Germany

References (Subscription Required)

Click to Expand
Issue

Vol. 85, Iss. 7 — 14 August 2000

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×