Abstract
The vortex sheet (VS) is the most unexpected discovery in rotating superfluids during the last ten years. Usually superfluids respond to rotation by creating an array of vortex lines, which are parallel to the rotation axis, and the circulation around them is quantized. In the VS the vorticity is located on a 2 dimensional sheet that folds to equidistant layers in a rotating container. The VS is one out of five stable vortex structures in3He-A. The stability of the VS in3He-A arises from a special structure, which consists of a nonsingular vorticity bound to a topologically stable domain wall. The vortex sheet forms the equilibrium state of3He-A at rotation velocities larger than ∼3 rad/s, but it is also created as metastable state at lower velocities. Experimentally the vortex sheet is distinguished from its NMR response.
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Thuneberg, E.V. Vortex sheet in superfluid3He-A. Czech J Phys 46 (Suppl 6), 2937–2942 (1996). https://doi.org/10.1007/BF02548094
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DOI: https://doi.org/10.1007/BF02548094