Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Meissner effect in a charged Bose gas with short-range repulsion   The question of whether the BEC is a necessary condition of the Meissner
effect is examined. The electromagnetic susceptibility of a charged Bose gas
with short-range repulsion is studied using the perturbation theory with
respect to the repulsive force. With decreasing temperature, the
Bose-statistical coherence grows, and prior to the BEC phase the susceptibility
shows a singularity implying the Meissner effect. This means that the BEC is a
sufficient, but not a necessary condition of the Meissner effect in the charged
Bose gas with short-range repulsion.

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The categories of this paper are: chao-dyn
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The categories of this paper are: nlin
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The categories of this paper are: eess
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The categories of this paper are: hep-lat
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The categories of this paper are: hep-th
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The categories of this paper are: nucl-ex
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The categories of this paper are: astro-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-ex
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The categories of this paper are: q-fin
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The categories of this paper are: math
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The categories of this paper are: plasm-ph
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The categories of this paper are: funct-an
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The categories of this paper are: stat