Persistent currents in spinor condensates
Quantum Gases
2013-01-15 v2 Statistical Mechanics
Superconductivity
Atomic Physics
Quantum Physics
Abstract
We create and study persistent currents in a toroidal two-component Bose gas, consisting of Rb atoms in two different spin states. For a large spin-population imbalance we observe supercurrents persisting for over two minutes. However we find that the supercurrent is unstable for spin polarisation below a well defined critical value. We also investigate the role of phase coherence between the two spin components and show that only the magnitude of the spin-polarisation vector, rather than its orientation in spin space, is relevant for supercurrent stability.
Cite
@article{arxiv.1210.4834,
title = {Persistent currents in spinor condensates},
author = {Scott Beattie and Stuart Moulder and Richard J. Fletcher and Zoran Hadzibabic},
journal= {arXiv preprint arXiv:1210.4834},
year = {2013}
}
Comments
4 pages, 5 figures