Augmented hybrid exact-diagonalization solver for dynamical mean field theory

2012/07/24 by C. Weber, Cédric Weber, A. Amaricci +3
Physics and Astronomy · #Magnetic properties of thin films #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #cond-mat.mtrl-sci #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.86.115136

published as Phys. Rev. B 86, 115136 (2012)

arxiv created 2012/07/24 · openalex publication_date 2012/09/26 · arxiv updated 2015/03/09 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We present a methodology to solve the Anderson impurity model in the context of dynamical mean field theory based on the exact-diagonalization method. We propose a strategy to effectively refine the exact-diagonalization solver by combining a finite-temperature Lanczos algorithm with an adapted version of the cluster perturbation theory. We show that the augmented diagonalization yields an improved accuracy in the description of the spectral function of the single-band Hubbard model and is a reliable approach for a full d-orbital manifold calculation.

Citations

• Effective bandstructure in the insulating phase versus strong dynamical correlations in metallicVO2
• Density-matrix algorithms for quantum renormalization groups
• Spectral Weight of the Hubbard Model through Cluster Perturbation Theory
• Strongly Correlated Superconductivity
• Cluster-dynamical mean-field theory of the density-driven Mott transition in the one-dimensional Hubbard model