Variational wave functions and ground-state properties in the one-dimensional <i>t</i>-<i>J</i> model

Hisatoshi Yokoyama; Masao Ogata

doi:10.1103/PhysRevLett.67.3610

Variational wave functions and ground-state properties in the one-dimensional t-J model

Hisatoshi Yokoyama and Masao Ogata

Phys. Rev. Lett. 67, 3610 – Published 16 December 1991

Abstract

Ground-state properties of the one-dimensional t-J model are studied by using exact diagonalization of small systems and compared with those found with Gutzwiller-Jastrow–type variational functions. Near the supersymmetric case (J/t=2), the Gutzwiller wave function is an extremely good trial function for all electron densities. It reproduces momentum distribution and correlation functions of the exact ground state except for critical behaviors. For J/t<2 (>2), the ground-state properties are well described by Jastrow functions with repulsive (attractive) intersite correlations.

Received 17 May 1991

DOI:https://doi.org/10.1103/PhysRevLett.67.3610

Authors & Affiliations

Hisatoshi Yokoyama and Masao Ogata

Department of Applied Physics, Tohoku University, Aramaki Aoba, Aoba-ku, Sendai 980, Japan
Theoretische Physik, Eidgenössische Technische Hochschule Hönggerberg and Interdisciplinary Project Center for Superconducting, Eidgenössische Technische Hochschule Zürich, CH-8093, Zürich, Switzerland