126 citations · 1k across the 29 of their papers we have counts for
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cond-mat.str-el2008★ 126 cited
Efficient perturbation theory for quantum lattice models
H. Hafermann, G. Li, A. N. Rubtsov +3
We present a novel approach to long-range correlations beyond dynamical mean-field theory through a ladder approximation to dual fermions. The new technique is applied to the two-d…
cond-mat.str-el2008★ 48 cited
Study of the Hubbard model on the triangular lattice using dynamical cluster approximation and dual fermion methods
Hunpyo Lee, Gang Li, Hartmut Monien
We investigate the Hubbard model on the triangular lattice at half-filling using the dynamical cluster approximation (DCA) and dual fermion (DF) methods in combination with continu…
cond-mat.str-el2008★ 20 cited
Lattice susceptibility for 2D Hubbard Model within dual fermion method
Gang Li, Hunpyo Lee, Hartmut Monien
In this paper, we present details of the dual fermion (DF) method to study the non-local correction to single site DMFT. The DMFT two-particle Green's function is calculated using…