Abstract
We present the experimental realization of a long-lived superfluid flow of a quantum gas rotating in an anharmonic potential, sustained by its own angular momentum. The gas is set into motion by rotating an elliptical deformation of the trap. An evaporation selective in angular momentum yields an acceleration of rotation until the density vanishes at the trap center, resulting in a dynamical ring with angular momentum per particle. The density profile of the ring corresponds to the one of a quasi two-dimensional superfluid, with a linear velocity reaching Mach 18 and a rotation lasting more than a minute.
- Received 28 June 2019
DOI:https://doi.org/10.1103/PhysRevLett.124.025301
© 2020 American Physical Society
Physics Subject Headings (PhySH)
Synopsis
Superfluid Doughnut Spins at Supersonic Speeds
Published 13 January 2020
Researchers rev up a rotating Bose-Einstein condensate to beyond a critical speed, setting the stage for creating a giant superfluid vortex.
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