An Improved Initialization Procedure for the Density-Matrix Renormalization Group
| dc.creator | Tezuka, Masaki | |
| dc.date | 2007-02-09 | |
| dc.date | 2007-02-10 | |
| dc.date.accessioned | 2026-07-07T07:58:24Z | |
| dc.date.available | 2026-07-07T07:58:24Z | |
| dc.description | We propose an initialization procedure for the density-matrix renormalization group (DMRG): {\it the recursive sweep method}. In a conventional DMRG calculation, the infinite-algorithm, where two new sites are added to the system at each step, has been used to reach the target system size. We then need to obtain the ground state for a different system size for every site addition, so 1) it is difficult to supply a good initial vector for the numerical diagonalization for the ground state, and 2) when the system reduced to a 1D system consists of an array of nonequivalent sites as in ladders or Hubbard-Holstein model, special care has to be taken. Our procedure, which we call the {\it recursive sweep method}, provides a solution to these problems and in fact provides a faster algorithm for the Hubbard model as well as more complicated ones such as the Hubbard-Holstein model. | |
| dc.description | 4 pages, 4 figures, submitted to JPSJ | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0702242 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0702242 | |
| dc.identifier | J. Phys. Soc. Jpn. 76, 053001 (May 2007) | |
| dc.identifier | doi:10.1143/JPSJ.76.053001 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/127994 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.subject | Statistical Mechanics | |
| dc.title | An Improved Initialization Procedure for the Density-Matrix Renormalization Group | |
| dc.type | text |