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arXiv · 1112.3220

Three fluid hydrodynamics of spin-1 Bose-Einstein condensates

Gergely Szirmai·Peter Szepfalusy
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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.

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Gergely Szirmai, Peter Szepfalusy. 2011-12-14. Three fluid hydrodynamics of spin-1 Bose-Einstein condensates. https://doi.org/10.1103/physreva.85.053603

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