Density matrix renormalisation group for a quantum spin chain at non-zero temperature
Condensed Matter
2009-10-28 v1
Abstract
We apply a recent adaptation of White's density matrix renormalisation group (DMRG) method to a simple quantum spin model, the dimerised chain, in order to assess the applicabilty of the DMRG to quantum systems at non-zero temperature. We find that very reasonable results can be obtained for the thermodynamic functions down to low temperatures using a very small basis set. Low temperature results are found to be most accurate in the case when there is a substantial energy gap.
Cite
@article{arxiv.cond-mat/9609001,
title = {Density matrix renormalisation group for a quantum spin chain at non-zero temperature},
author = {R. J. Bursill and T. Xiang and G. A. Gehring},
journal= {arXiv preprint arXiv:cond-mat/9609001},
year = {2009}
}
Comments
6 pages, Standard Latex File + 7 PostScript figures available on request