Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Topological defects in mixtures of superconducting condensates with
  different charges   We investigate the topological defects in phenomenological models describing
mixtures of charged condensates with commensurate electric charges. Such
situations are expected to appear for example in liquid metallic deuterium.
This is modeled by a multicomponent Ginzburg-Landau theory where the
condensates are coupled to the same gauge field by different coupling constants
whose ratio is a rational number. We also briefly discuss the case where
electric charges are incommensurate. Flux quantization and finiteness of the
energy per unit length dictate that the different condensates have different
winding and thus different number of (fractional) vortices. Competing
attractive and repulsive interactions lead to molecule-like bound state between
fractional vortices. Such bound states have finite energy and carry integer
flux quanta. These can be characterized by $\mathbb{C}P^1$ topological
invariant that motivates their denomination as skyrmions.

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The categories of this paper are: physics
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The categories of this paper are: q-fin
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The categories of this paper are: nucl-th
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The categories of this paper are: q-bio
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The categories of this paper are: chem-ph
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The categories of this paper are: cs
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The categories of this paper are: comp-gas
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The categories of this paper are: cmp-lg
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The categories of this paper are: eess
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The categories of this paper are: funct-an
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The categories of this paper are: acc-phys
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The categories of this paper are: gr-qc
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The categories of this paper are: mtrl-th
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The categories of this paper are: dg-ga
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The categories of this paper are: math
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The categories of this paper are: hep-lat