A note on cluster methods for strongly correlated electron systems

Details A note on cluster methods for strongly correlated electron systems A note on cluster methods for strongly correlated electron systems

2001-07-05

arxiv.org/abs/cond-mat/0107108v2

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 3 figures; major changes

Scientific paper

10.1103/PhysRevB.65.155112

We develop, clarify and test various aspects of cluster methods dynamical mean field methods using a soluble toy model as a benchmark. We find that the Cellular Dynamical Mean Field Theory (C-DMFT) converges very rapidly and compare its convergence properties with those of the Dynamical Cluster Approximation (DCA). We propose and test improved estimators for the lattice self energy within C-DMFT.

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