Contractor renormalization group theory of the SU($N$) chains and ladders
Strongly Correlated Electrons
2016-08-31 v2
Abstract
Contractor renormalization group (CORE) method is applied to the SU() chain and ladders in this paper. In our designed schemes, we show that these two classes of systems can return to their original form of Hamiltonian after CORE transformation. Successive iteration of the transformation leads to a fixed point so that the ground state energy and the energy gap to the ground state can be deduced. The result of SU() chain is compared with the one by Bethe ansatz method. The transformation on spin-1/2 ladders gives a finite gap in the excited energy spectra to the ground state in an intuitive way. The application to SU(3) ladders is also discussed.
Keywords
Cite
@article{arxiv.cond-mat/0412358,
title = {Contractor renormalization group theory of the SU($N$) chains and ladders},
author = {Peng Li and Shun-Qing Shen},
journal= {arXiv preprint arXiv:cond-mat/0412358},
year = {2016}
}
Comments
4 pages, 4 figures, submitted to Phys. Rev. B