Augmented hybrid exact-diagonalization solver for dynamical mean field theory

TY - JOUR

T1 - Augmented hybrid exact-diagonalization solver for dynamical mean field theory

AU - Weber, C.

AU - Amaricci, A.

AU - Capone, M.

AU - Littlewood, P. B.

PY - 2012/9/26

Y1 - 2012/9/26

N2 - 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.

AB - 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.

KW - SUPERCONDUCTIVITY

KW - INFINITE DIMENSIONS

U2 - 10.1103/PhysRevB.86.115136

DO - 10.1103/PhysRevB.86.115136

M3 - Article

SN - 1098-0121

VL - 86

JO - Physical Review B (Condensed Matter and Materials Physics)

JF - Physical Review B (Condensed Matter and Materials Physics)

IS - 11

M1 - 115136

ER -