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- W2045101147 abstract "Experiments in superfluid $^{4}text{H}text{e}$ show that at low temperatures, energy dissipation from moving vortices is many orders of magnitude larger than expected from mutual friction. Here we investigate other mechanisms for energy loss by a computational study of a vortex that moves through and reconnects with a mesh of small vortices pinned to the container wall. We find that such reconnections enhance energy loss from the moving vortex by a factor of up to 100 beyond that with no mesh. The enhancement occurs through two different mechanisms, both involving the Kelvin oscillations generated along the vortex by the reconnections. At relatively high temperatures the Kelvin waves increase the vortex motion, leading to more energy loss through mutual friction. As the temperature decreases, the vortex oscillations generate additional reconnection events between the moving vortex and the wall, which decrease the energy of the moving vortex by transferring portions of its length to the pinned mesh on the wall." @default.
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- W2045101147 date "2010-05-14" @default.
- W2045101147 modified "2023-09-26" @default.
- W2045101147 title "Energy loss from reconnection with a vortex mesh" @default.
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- W2045101147 doi "https://doi.org/10.1103/physrevb.81.174515" @default.
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