Work

Hybridization expansion impurity solver: General formulation and application to Kondo lattice and two-orbital models

Year: 2006

Type: article

Abstract: A recently developed continuous time solver based on an expansion in hybridization about an exactly solved local limit is reformulated in a manner appropriate for general classes of quantum impurity models including spin exchange and pair hopping terms. The utility of the approach is demonstrated via applications to the dynamical mean field theory of the Kondo lattice and two-orbital models. The algorithm can handle low temperatures and strong couplings without encountering a sign problem.

Source: Physical Review B

DOI: 10.1103/physrevb.74.155107

Authors: Philipp Werner, Andrew J. Millis

Institution: Columbia University

Language: English

Topic: Physics of Superconductivity and Magnetism

Subfield: Condensed Matter Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: National Science Foundation, Eidgenössische Technische Hochschule Zürich, Division of Materials Research

Award: Quantum Critical Phenomena and Non Fermi Liquid Physics