Total spin in the density matrix renormalization group algorithm

Authors
McCulloch, IP Gulacsi, M
Citation
Ip. Mcculloch et M. Gulacsi, Total spin in the density matrix renormalization group algorithm, PHIL MAG L, 81(6), 2001, pp. 447-453
Citations number
6
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHILOSOPHICAL MAGAZINE LETTERS
ISSN journal
09500839 → ACNP
Volume
81
Issue
6
Year of publication
2001
Pages
447 - 453
Database
ISI
SICI code
0950-0839(200106)81:6<447:TSITDM>2.0.ZU;2-3
Abstract
A new density matrix renormalization group (DMRG) algorithm is presented wh ich conserves the total spin. This is the first time that standard DMRG is extended to exploit fully the symmetries of the Hamiltonian. The obtained g eneral procedure works for any operator, even operators that do not commute with the Hamiltonian. The new method gives substantial improvements over t he standard DMRG.