Some exact results for one-dimensional two-band SU(2) bosons
Zhejiang Institute of Modern Physics, Department of
Physics, Zhejiang University, Hangzhou 310027, P.R.
Corresponding author: a email@example.com
Published online: 12 August 2004
A one-dimensional model for two-band SU(2) bosons with isospin exchange interaction is solved by means of the nested Bethe-ansatz method. The features of the ground state and low-lying excitation state are discussed explicitly by numerical and analytical method. The thermodynamics of the system is analyzed by means of the thermodynamic Bethe-ansatz method, and some physical quantities, such as magnetization, specific heat, etc. are obtained explicitly in some special cases.
PACS: 03.65.-w – Quantum mechanics / 72.15.Nj – Collective modes (e.g., in one-dimensional conductors) / 03.65.Ge – Solutions of wave equations: bound states
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2004