Thermodynamics of a Bose-Einstein Condensate with Free Magnetization
- 25 January 2012
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 108 (4), 045307
- https://doi.org/10.1103/physrevlett.108.045307
Abstract
We study thermodynamic properties of a gas of spin atoms across Bose-Einstein condensation. Magnetization is free, due to dipole-dipole interactions. We show that the critical temperature for condensation is lowered at extremely low magnetic fields, when the spin degree of freedom is thermally activated. The depolarized gas condenses in only one spin component, unless the magnetic field is set below a critical value, below which a nonferromagnetic phase is favored. Finally, we present a spin thermometry efficient even below the degeneracy temperature. DOI: http://dx.doi.org/10.1103/PhysRevLett.108.045307 © 2012 American Physical Society
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