A NEW MULTI-FERMION REALIZATION OF SUQ(2) AND ITS APPLICATION TO THE LIPKIN-MESHKOV-GLICK MODEL

Authors
LI FL ZHANG SL HUANG Q
Citation
Fl. Li et al., A NEW MULTI-FERMION REALIZATION OF SUQ(2) AND ITS APPLICATION TO THE LIPKIN-MESHKOV-GLICK MODEL, Journal of physics. A, mathematical and general, 29(15), 1996, pp. 4641-4648
Citations number
18
Categorie Soggetti
Physics
Journal title
Journal of physics. A, mathematical and general → ACNP
ISSN journal
03054470
Volume
29
Issue
15
Year of publication
1996
Pages
4641 - 4648
Database
ISI
SICI code
0305-4470(1996)29:15<4641:ANMROS>2.0.ZU;2-2
Abstract
A new multi-fermion realization of SUq(2) is built, whose generators h ave been written as functions of operators of su(2) algebra. With the help of the realization, the influence of the q-deformation of su(2) a lgebra on the excitation spectrum and the ground state properties of t he Lipkin-Meshkov-Glick model can easily be understood. It is also sho wn that the variation approach on the basis of the usual su(2) coheren t state still works well for the q-deformed model.