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Interaction Round a Face DMRG method applied to rotational invariant quantum spin chains | | Tatsuaki Wada
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1 Sep 1999 | | Journal: | Phys. Rev. E 61, 3199-3206 (2000) | | Subject: | Statistical Mechanics | cond-mat.stat-mech | | Abstract: | An interaction-round-a-face density-matrix renormalization-group (IRF-DMRG) method is developed for higher integer spin chain models which are rotational invariant. The expressions of the IRF weights associated with the nearest-neighbor spin-S interaction ${f S}_{i} cdot {f S}_{i+1}$ are derived explicitly. Using the IRF-DMRG with these IRF weights, the Haldane gaps $Delta$ and the ground state energy densities $e_{0}$ for both S=1 and S=2 isotropic antiferromagnetic Heisenberg quantum spin chains are calculated by keeping up to only m=90 states. | | Source: | arXiv, cond-mat/9909003 | | Services: | Forum | Review | PDF | Favorites | |
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