Persistent currents in two-component condensates in a toroidal trap
arXiv:1310.0400 · doi:10.1103/PhysRevA.89.053602
Abstract
The stability of persistent currents in a two-component Bose-Einstein condensate in a toroidal trap is studied both in the miscible and immiscible regimes. In the miscible regime we show that superflow decay is related to linear instabilities of the spin-density Bogoliubov mode. We find a region of partial stability, where the flow is stable in the majority component while it decays in the minority component. We also characterize the dynamical instability appearing for a large relative velocity between the two components. In the immiscible regime the stability criterion is modified and depends on the specific density distribution of the two components. The effect of a coherent coupling between the two components is also discussed.
11 pages, 8 figures
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- Spin-orbit-coupled spin-1 Bose-Einstein condensates in a toroidal trap: even-petal-number necklacelike state and persistent flow
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- Interfaces between Bose-Einstein and Tonks-Girardeau atomic gases
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- Mixture of two unequally charged superfluids in a magnetic field
- Controlled acoustic-driven vortex transport in coupled superfluid rings
- Counterflow and coflow instabilities in miscible binary superfluids
- Oscillating superflow in multicomponent Bose-Einstein condensates