In simulated mergers of two toroidal BECs, the final vorticity is set by the initially more populated ring above an imbalance threshold, while elongated traps support long-lived hybrid vortex complexes.
Atomic Josephson vortex
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abstract
We show that Josephson vortices in a quasi-1D atomic Bose Josephson junction can be controllably manipulated by imposing a difference of chemical potentials on the atomic BEC waveguides forming the junction. This effect, which has its origin in the Berry phase structure of a vortex, turns out to be very robust in the whole range of the parameters where such vortices can exist. We also propose that a Josephson vortex can be created by the phase imprinting technique and can be identified by a specific tangential feature in the interference picture produced by expanding clouds released from the waveguides.
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cond-mat.quant-gas 1years
2019 1verdicts
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Nonlinear dynamics of Josephson vortices in merging superfluid rings
In simulated mergers of two toroidal BECs, the final vorticity is set by the initially more populated ring above an imbalance threshold, while elongated traps support long-lived hybrid vortex complexes.