Spin waves in a one-dimensional spinor bose gas

We study a one-dimensional (iso)spin 1/2 Bose gas with repulsive delta-function interaction by the Bethe Ansatz method and discuss the excitations above the polarized ground state. In addition to phonons the system features spin waves with a quadratic dispersion. We compute analytically and numerica...

Full description

Saved in:

Bibliographic Details
Published in:	Physical review letters Vol. 95; no. 15; pp. 150402.1 - 150402.4
Main Authors:	FUCHS, J. N, GANGARDT, D. M, KEILMANN, T, SHLYAPNIKOV, G. V
Format:	Journal Article
Language:	English
Published:	Ridge, NY American Physical Society 07-10-2005
Subjects:	BOSE-EINSTEIN GAS BOSONS Condensed Matter DELTA FUNCTION EFFECTIVE MASS Exact sciences and technology EXCITATION GROUND STATES ISOSPIN Mesoscopic Systems and Quantum Hall Effect NUCLEAR PHYSICS AND RADIATION PHYSICS ONE-DIMENSIONAL CALCULATIONS PHONONS Physics SPIN SPIN WAVES Statistical Mechanics STRONG-COUPLING MODEL TRAPPING Spinors Spin waves
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	We study a one-dimensional (iso)spin 1/2 Bose gas with repulsive delta-function interaction by the Bethe Ansatz method and discuss the excitations above the polarized ground state. In addition to phonons the system features spin waves with a quadratic dispersion. We compute analytically and numerically the effective mass of the spin wave and show that the spin transport is greatly suppressed in the strong coupling regime, where the isospin-density (or "spin charge") separation is maximal. Using a hydrodynamic approach, we study spin excitations in a harmonically trapped system and discuss prospects for future studies of two-component ultracold atomic gases.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.95.150402