Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the effect of the thermal gas component to the stability of vortices
  in trapped Bose-Einstein condensates   We study the stability of vortices in trapped single-component Bose-Einstein
condensates within self-consistent mean-field theories--especially we consider
the Hartree-Fock-Bogoliubov-Popov theory and its recently proposed gapless
extensions. It is shown that for sufficiently repulsively interacting systems
the anomalous negative-energy modes related to vortex instabilities are lifted
to positive energies due to partial filling of the vortex core with
noncondensed gas. Such a behavior implies that within these theories the vortex
states are eventually stable against transfer of condensate matter to the
anomalous core modes. This self-stabilization of vortices, shown to occur under
very general circumstances, is contrasted to the predictions of the
non-self-consistent Bogoliubov approximation, which is known to exhibit
anomalous modes for all vortex configurations and thus implying instability of
these states. In addition, the shortcomings of these approximations in
describing the properties of vortices are analysed, and the need of a
self-consistent theory taking properly into account the coupled dynamics of the
condensate and the noncondensate atoms is emphasized.

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The categories of this paper are: physics
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
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The categories of this paper are: quant-ph
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The categories of this paper are: cs
23
The categories of this paper are: solv-int
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The categories of this paper are: hep-lat
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The categories of this paper are: stat
31
The categories of this paper are: ao-sci
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The categories of this paper are: acc-phys
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The categories of this paper are: patt-sol
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The categories of this paper are: hep-ex
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The categories of this paper are: dg-ga
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The categories of this paper are: funct-an
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The categories of this paper are: mtrl-th
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The categories of this paper are: chao-dyn