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arXiv · 1210.4834

Persistent currents in spinor condensates

Scott Beattie·Stuart Moulder·Richard J. Fletcher·Zoran Hadzibabic
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Abstract

We create and study persistent currents in a toroidal two-component Bose gas, consisting of $^{87}$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.

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cond-mat.quant-gascond-mat.stat-mechcond-mat.supr-conphysics.atom-phquant-ph

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Scott Beattie, Stuart Moulder, Richard J. Fletcher, Zoran Hadzibabic. 2012-10-17. Persistent currents in spinor condensates. https://doi.org/10.1103/physrevlett.110.025301

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