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- interaction are explicitly derived. Using the IRF-DMRG with these IRF weights, the Haldane gaps and the ground state energy densities for both and isotropic antiferromagnetic Heisenberg quantum spin chains are calculated by keeping up to only states.
- Received 1 September 1999
DOI:https://doi.org/10.1103/PhysRevE.61.3199
©2000 American Physical Society