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期刊论文
Exact results of the ground state and excitation properties of a two-component interacting Bose system
Europhys. Lett., 61 (3), pp. 368-374 (2003),-0001,():
We study a one-dimensional Bose system with repulsive δ-function interaction in the presence of an SU(2) intrinsic degree of freedom on the basis of the coordinate Bethe ansatz. The ground state and the low-lying excitations are determined by both numerical and analytical methods. It is shown that the ground state is an isospin-ferromagnetic state, and the excitations are composed of three elementary particles: holons, antiholons, and isospinons. The isospinon is a triplet coupled to the "ferromagnetic" background anti-parallelly.
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