Quantum Renormalization Groups Based on Natural Orbitals
Strongly Correlated Electrons
2014-02-17 v3 Chemical Physics
Computational Physics
Quantum Physics
Abstract
We propose a new concept upon the renormalization group (RG) procedure for an interacting many-electron correlated system in the framework of natural orbitals, and formulate an algorithm for this RG approach. To demonstrate its effectiveness, we apply this new approach on a quantum cluster-impurity model with four impurities in comparison with the exact diagonalization method. We also find a shortcut to dramatically improving this RG algorithm. Further discussion is presented with the cluster dynamical mean-field theory and multi-impurity/orbital Kondo problems.
Keywords
Cite
@article{arxiv.1306.3662,
title = {Quantum Renormalization Groups Based on Natural Orbitals},
author = {Rong-Qiang He and Zhong-Yi Lu},
journal= {arXiv preprint arXiv:1306.3662},
year = {2014}
}
Comments
4.5 pages, 4 figures, and 1 table; 3 pages Supl. with another 2 figures and 4 tables; In this version, we update the Supl. with more discussions and comparisons with DMRG