A REAL-SPACE FINITE CLUSTER APPROACH TO THE CORRELATED ELECTRON PROBLEM

Authors
JEFFERSON JH STEPHAN W
Citation
Jh. Jefferson et W. Stephan, A REAL-SPACE FINITE CLUSTER APPROACH TO THE CORRELATED ELECTRON PROBLEM, Physica. C, Superconductivity, 235, 1994, pp. 2251-2252
Citations number
8
Categorie Soggetti
Physics, Applied
Journal title
Physica. C, Superconductivity → ACNP
ISSN journal
09214534
Volume
235
Year of publication
1994
Part
4
Pages
2251 - 2252
Database
ISI
SICI code
0921-4534(1994)235:<2251:ARFCAT>2.0.ZU;2-Q
Abstract
A new finite-cluster method for the correlated electron problem has be en applied to Hubbard and Heisenberg models and shown to yield accurat e solutions for the ground-state and low-lying excited states of finit e systems. Iterating this method results in much improved estimates of ground-state energy densities in the thermodynamic limit compared wit h the usual numerical renormalisation group approach.