Excitations and Thermodynamics of One-Dimensional Boson System with δ-Function Interaction

Tien-Ke Lai；Cherng-Hsiao Lin；Chin-Rong Lee；Hsiang-Nan Li

Chinese Journal of Physics

33卷5期（1995 / 10 / 01）

477 - 492

英文

We present the excitation spectra of a one-dimensional boson system with b-function interaction, which includes a velocity-dependent pseudopotential. The equilibrium thermodynamics of the system is studied and the behavior of the particle distribution at different temperature is given. The effects from the velocity-dependent interaction are analyzed. We address also on the question whether a one-dimensional fermion system with this pseudopotential is solvable.