We present a procedure to calculate 1/d corrections to two-particle properties around the infinite-dimensional dynamical mean-field limit. Our method is based on a modified version of the scheme of Schiller and Ingersent (Ref. 7), where the cancellation of overcounted diagrams is assured at each iteration step. We test our method on the half-filled Hubbard model using the fluctuation exchange approximation. To within numerical accuracy, we find stable, causal solutions for which 1/d corrections to the local correction are relatively small.
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|Publication status||Published - Dec 15 2000|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics