Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Anomalous fluctuations of the condensate in interacting Bose gases   We find that the fluctuations of the condensate in a weakly interacting Bose
gas confined in a box of volume $V$ follow the law $<\delta N_0^2>\sim
V^{4/3}$. This anomalous behaviour arises from the occurrence of infrared
divergencies due to phonon excitations and holds also for strongly correlated
Bose superfluids. The analysis is extended to an interacting Bose gas confined
in a harmonic trap where the fluctuations are found to exhibit a similar
anomaly.

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The categories of this paper are: math-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: hep-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: nucl-ex
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The categories of this paper are: nlin
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The categories of this paper are: econ
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The categories of this paper are: quant-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: adap-org
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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: stat
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The categories of this paper are: gr-qc
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The categories of this paper are: acc-phys