Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Strongly Interacting Two-Dimensional Bose Gases   We prepare and study strongly interacting two-dimensional Bose gases in the
superfluid, the classical Berezinskii-Kosterlitz-Thouless (BKT) transition, and
the vacuum-to-superfluid quantum critical regimes. A wide range of the two-body
interaction strength 0.05 < g < 3 is covered by tuning the scattering length
and by loading the sample into an optical lattice. Based on the equations of
state measurements, we extract the coupling constants as well as critical
thermodynamic quantities in different regimes. In the superfluid and the BKT
transition regimes, the extracted coupling constants show significant
down-shifts from the mean-field and perturbation calculations when g approaches
or exceeds one. In the BKT and the quantum critical regimes, all measured
thermodynamic quantities show logarithmic dependence on the interaction
strength, a tendency confirmed by the extended classical-field and
renormalization calculations.

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The categories of this paper are: q-bio
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-lat
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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: solv-int
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The categories of this paper are: funct-an
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The categories of this paper are: plasm-ph
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The categories of this paper are: stat
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The categories of this paper are: astro-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: atom-ph
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The categories of this paper are: q-fin
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The categories of this paper are: cs
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The categories of this paper are: math
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The categories of this paper are: hep-ex