Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Three-dimensional numerical simulation of long-lived quantum vortex
  knots and links in a trapped Bose-Einstein condensate   Dynamics of simplest vortex knots, unknots, and links of torus type inside an
atomic Bose-Einstein condensate in anisotropic harmonic trap at zero
temperature has been numerically simulated using three-dimensional
Gross-Pitaevskii equation. The lifetime for such quasi-stationary rotating
vortex structures has been found quite long in wide parametric domains of the
system. This result is in qualitative agreement with a previous prediction
based on a simplified one-dimensional model approximately describing dynamics
of vortex filaments [V.P. Ruban, JETP 126, 397 (2018)].

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The categories of this paper are: eess
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The categories of this paper are: q-bio
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The categories of this paper are: plasm-ph
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The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc
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The categories of this paper are: hep-lat
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The categories of this paper are: chao-dyn
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The categories of this paper are: physics
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The categories of this paper are: dg-ga
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The categories of this paper are: bayes-an
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The categories of this paper are: alg-geom
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The categories of this paper are: hep-th
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The categories of this paper are: hep-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph