Title

Hard-core bosonization of the one-dimensional t-J model

Document Type

Article

Publication Date

12-1-2009

Abstract

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

First Page

479

Last Page

484

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