Open AccessELEMENTARY EXCITATIONS OF ONE-DIMENSIONALQUANTUM SINE-GORDON MODEL
Author(s) -
Yuguang Chen,
Yuan Qing-Shan,
Chang Seop Hong,
Yumei Zhang,
Xiang Wu
Publication year - 1997
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.46.1174
Subject(s) - bosonization , thirring model , physics , sine , quantum , mathematical physics , perturbation theory (quantum mechanics) , hubbard model , quantum mechanics , sine gordon equation , theoretical physics , soliton , fermion , superconductivity , mathematics , nonlinear system , geometry
Using the-self-consistent quantum perturbation theory, we study the elementary excitaton of one-dimensional sine-Gordon model described by parameters α0 and β0. It is demonstrated in this article that the elementary excitations consist of quantum solitons and antisolitons.Under the condition α020≤8π,our results for the gaps agree with the exact results of the Thirring model and the half-filling Hubbard model based on the bosonization techniques.