Tuesday, June 18, 2013

1306.3662 (Rong-Qiang He et al.)

Quantum Renormalization Groups Based on Natural Orbitals    [PDF]

Rong-Qiang He, Zhong-Yi Lu
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 4 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.
View original: http://arxiv.org/abs/1306.3662

No comments:

Post a Comment