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Reconnections of quantum vorices

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We demonstrate that a single reconnection of two quantum vortices can lead to creation of a cascade of vortex rings. Our analysis, motivated by the analytical solution in LIA, involves high-resolution Biot-Savart and Gross-Pitaevskii simulations. The latter showed that the rings cascade starts on the atomic scale, with rings diameters orders of magnitude smaller than the characteristic line spacing in the tangle. So created vortex rings may penetrate the tangle and annihilate on the boundaries. This provides an efficient mechanism of the vortex tangle decay in very low temperatures.

Author(s):

Konrad Bajer    
University of Warsaw, Faculty of Physics
Poland

Miron Kursa    
University of Warsaw, ICM
Poland

Tomasz Lipniacki    
Institute for Fundamental Technological Research (IPPT PAN)
Poland