Journal
PHYSICAL REVIEW LETTERS
Volume 111, Issue 23, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.111.235301
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Funding
- U.S. National Science Foundation [PHY-0855677, PHY-1205713, DMS-0806762]
- U.S. Army Research Office
- Marsden Fund
- Royal Society of New Zealand
- New Zealand Foundation for Research, Science, and Technology [UOOX0801, NERF-UOOX0703]
- Australian Research Council [DP1094025]
- Direct For Mathematical & Physical Scien
- Division Of Mathematical Sciences [1309035, 1312856] Funding Source: National Science Foundation
- Division Of Physics
- Direct For Mathematical & Physical Scien [1205713] Funding Source: National Science Foundation
- Australian Research Council [DP1094025] Funding Source: Australian Research Council
- New Zealand Ministry of Business, Innovation & Employment (MBIE) [UOOX0801] Funding Source: New Zealand Ministry of Business, Innovation & Employment (MBIE)
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Fluids subjected to suitable forcing will exhibit turbulence, with characteristics strongly affected by the fluid's physical properties and dimensionality. In this work, we explore two-dimensional (2D) quantum turbulence in an oblate Bose-Einstein condensate confined to an annular trapping potential. Experimentally, we find conditions for which small-scale stirring of the condensate generates disordered 2D vortex distributions that dissipatively evolve toward persistent currents, indicating energy transport from small to large length scales. Simulations of the experiment reveal spontaneous clustering of samecirculation vortices and an incompressible energy spectrum with k(-5/3) dependence for low wave numbers k. This work links experimentally observed vortex dynamics with signatures of 2D turbulence in a compressible superfluid.
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