Phys. Rev. Lett. 69, 2863–2866 (1992)Density matrix formulation for quantum renormalization groups
A generalization of the numerical renormalization-group procedure used first by Wilson for the Kondo problem is presented. It is shown that this formulation is optimal in a certain sense. As a demonstration of the effectiveness of this approach, results from numerical real-space renormalization-group calculations for Heisenberg chains are presented. © 1992 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.69.2863
DOI:
10.1103/PhysRevLett.69.2863
PACS:
75.10.Jm, 02.70.+d, 05.30.-d
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