t-J model studied by the power Lanczos method

Files
Note (205.25 KB)
Downloads: 377
TR Number
Date
1995-03
Journal Title
Journal ISSN
Volume Title
Publisher
American Physical Society
Abstract

The initial trial wave function used in a simple ground-state projection method, the power method, is systematically improved by using Lanczos algorithm. Much faster convergence to the ground state achieved by using these wave functions significantly reduces the effect of the fermion sign problem. The results for the ground state of the two-dimensional t-J model are presented. The density correlation function for the t-J model at small J shows a surprisingly good agreement with that of a system of noninteracting hard-core bosons.

Description
Keywords
hubbard-model, phase, state, systems, physics, condensed matter
Citation
Chen, Y. C.; Lee, T. K., "t-J model studied by the power Lanczos method," Phys. Rev. B 51, 6723 DOI: http://dx.doi.org/10.1103/PhysRevB.51.6723