Three fluid hydrodynamics of spin-1 Bose-Einstein condensates

Details Three fluid hydrodynamics of spin-1 Bose-Einstein condensates Three fluid hydrodynamics of spin-1 Bose-Einstein condensates

2011-12-14

arxiv.org/abs/1112.3220v1

Physics

Condensed Matter

Quantum Gases

Scientific paper

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.

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