Bose Gas in One Dimension. I. The Closure Property of the Scattering Wavefunctions

M. Gaudin

M. Gaudin

M. Gaudin

M. Gaudin

A direct calculation gives the normalization integral for a basis of scattering wavefunctions of interacting bosons in one dimension.

M. Gaudin

We verify the closure relation of a continuum basis of Lieb's wavefunctions, describing the scattering states of identical bosons interacting via a δ-function potential in one dimension.

Li Yang, Shah Saad Alam, Han Pu

Abstract Quantum many-body systems in one dimension (1D) exhibit some peculiar properties. In this article, we review some of our work on strongly interacting 1D spinor quantum gas. First, we discuss a generalized Bose–Fermi mapping that maps the charge degrees of freedom to a spinless Fermi gas and the spin degrees of freedom to a spin chain model. This also maps the strongly interacting system into a weakly interacting one, which is amenable for perturbative calculations. Next, based on this mapping, we construct an ansatz wavefunction for the strongly interacting system, using which many physical quantities can be conveniently calculated. We showcase the usage of this ansatz wavefunction by considering the collective excitations and quench dynamics of a harmonically trapped system.