Three fluid hydrodynamics of spin-1 Bose-Einstein condensates
Quantum Gases
2012-05-09 v1 Quantum Physics
Abstract
We study excitations of the spin-1 Bose gas at finite temperatures and in the presence of a not so strong magnetic field, or equivalently, when the gas sample is partially polarized. Motivated by the success of two-fluid hydrodynamics of scalar superfluids we develop a three-fluid hydrodynamic description to treat the low frequency and long wavelength excitations of the spin-1 Bose gas. We derive the coupled linear hydrodynamic equations of the three sounds and evaluate them numerically in a self-consistent mean field approximation valid for the dilute gas at the intermediate and critical temperature regions. In this latter region we identify the critical mode.
Cite
@article{arxiv.1112.3220,
title = {Three fluid hydrodynamics of spin-1 Bose-Einstein condensates},
author = {Gergely Szirmai and Peter Szepfalusy},
journal= {arXiv preprint arXiv:1112.3220},
year = {2012}
}