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arXiv · 2111.02609

Hydrodynamic generation of skyrmions in a two-component Bose-Einstein condensate

Kyoshiro Sakaguchi·Keisuke Jimbo·Hiroki Saito
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Abstract

When an obstacle is moved in a superfluid faster than a critical velocity, quantized vortices are generated behind the obstacle. Here we propose a method to create more complicated topological excitations, three-dimensional skyrmions, behind a moving obstacle. We numerically show that, in a two-component Bose-Einstein condensate, component-dependent obstacle potentials can generate skyrmions in the wake, made up of quantized vortex rings in different components that are linked with each other. The lifetime of generated skyrmions can be prolonged by a guiding potential, which enables the formation of a skyrmion train.

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Kyoshiro Sakaguchi, Keisuke Jimbo, Hiroki Saito. 2021-11-04. Hydrodynamic generation of skyrmions in a two-component Bose-Einstein condensate. https://doi.org/10.1103/physreva.105.013312

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