Fast Impurity Solver for Dynamical Mean Field Theory based on second order perturbation around the atomic limit

Details Fast Impurity Solver for Dynamical Mean Field Theory based on second order perturbation around the atomic limit Fast Impurity Solver for Dynamical Mean Field Theory based on second order perturbation around the atomic limit

2009-11-07

arxiv.org/abs/0911.1422v1

Physics

Condensed Matter

Strongly Correlated Electrons

12 pages, 8 figures

Scientific paper

An impurity solver for the dynamical mean field (DMFT) study of the Mott insulators is proposed, which is based on the second order perturbation of the hybridization function. After carefully benchmarking it with Quantum Monte Carlo results on the anti-ferromagnetic phase of the Hubbard model, we conclude that this impurity solver can capture the main physical features in the strong coupling regime and can be a very useful tool for the LDA+DMFT studies of the Mott insulators with long range order.

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