Hard-core bosonization of the one-dimensional t-J model
The one-dimensional t-J model Hamiltonian is realized by using hard-core boson operators. A simple algorithm written in Mathematica based on a differential realization of the hard-core bosons for finding exact solutions of the model is proposed. As a simple example, some low-lying excitation energies, the inverse compressibility, and the superconducting structure factors, as well as the particle and spin entanglement of a system with 8 sites are calculated. The results not only confirm the validity of the hard-core boson picture, but also indicate that a quantum phase transition near phase-separation at zero temperature can also be recognized by the particle and spin entanglement. © 2009 EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg.
Publication Source (Journal or Book title)
European Physical Journal B
Pan, F., Xie, M., Lin, J., Xue, X., & Draayer, J. (2009). Hard-core bosonization of the one-dimensional t-J model. European Physical Journal B, 72 (4), 479-484. https://doi.org/10.1140/epjb/e2009-00393-x