MULTICONFIGURATIONAL SYMMETRIZED-PROJECTOR QUANTUM MONTE-CARLO METHODFOR LOW-LYING EXCITED-STATES OF THE HUBBARD-MODEL

Authors
SRINIVASAN B RAMASESHA S KRISHNAMURTHY HR
Citation
B. Srinivasan et al., MULTICONFIGURATIONAL SYMMETRIZED-PROJECTOR QUANTUM MONTE-CARLO METHODFOR LOW-LYING EXCITED-STATES OF THE HUBBARD-MODEL, Physical review. B, Condensed matter, 54(4), 1996, pp. 2276-2279
Citations number
14
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
54
Issue
4
Year of publication
1996
Pages
2276 - 2279
Database
ISI
SICI code
0163-1829(1996)54:4<2276:MSQMM>2.0.ZU;2-I
Abstract
We develop a multiconfigurational symmetrized-projector quantum Monte Carlo (MSPQMC) method to calculate excited-state properties of Hubbard models. We compare the MSPQMC results for finite Hubbard chains with exact results (where available) of with density-matrix renormalization -group results for longer chains. The energies and correlation functio ns of the excited states are in good agreement with those obtained fro m the alternate techniques.