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- Title
Hard-core bosonization of the one-dimensional t-J model.
- Authors
Pan, F.; Xie, M.-X.; Lin, J.-J.; Xue, X.-G.; Draayer, J. P.
- 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.
- Subjects
HAMILTONIAN systems; INTERACTING boson models; ALGORITHMS; MATHEMATICS; BOSONS
- Publication
European Physical Journal B: Condensed Matter, 2009, Vol 72, Issue 4, p479
- ISSN
1434-6028
- Publication type
Article
- DOI
10.1140/epjb/e2009-00393-x