Abstract
The two known mechanisms for superflow are the gradient of the U(1) phase and the spin-orbit-gauge symmetry. We find the third mechanism, namely a spatial variation of the order-parameter morphology protected by a hidden su(2) symmetry in a nonmagnetic spin-2 Bose-Einstein condensate. Possible experimental situations are also discussed.
- Received 17 May 2019
- Accepted 4 February 2020
DOI:https://doi.org/10.1103/PhysRevLett.124.105301
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