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 FOR 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.
ASJC Scopus subject areas
- Physics and Astronomy(all)