Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Excitation spectrum of a 2D long-range Bose-liquid with a supersymmetry   We have studied excitation spectrum of the specfic 2D model of strongly
interacting Bose particles via mapping of the many-body Schrodinger equation in
imaginary time to the classical stochastic dynamics. In a broad range of
coupling strength $\alpha$ a roton-like spectrum is found, with the roton gap
being extremely small in natural units. A single quantum phase transition
between strongly correlated supefluid and quantum Berezinsky crystal is found.

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The categories of this paper are: stat
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The categories of this paper are: q-fin
21
The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
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The categories of this paper are: eess
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The categories of this paper are: q-bio
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
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The categories of this paper are: math-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: acc-phys
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The categories of this paper are: atom-ph
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The categories of this paper are: funct-an
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The categories of this paper are: quant-ph