Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ground-state properties of dilute spinless fermions in fractional
  dimensions   We analyze zero-temperature universal properties of the simplest
Galilean-invariant model of spinless low-dimensional fermions with short-range
two-body interactions. In particular, it is shown that after proper
renormalization of the coupling constant, even the dilute system possesses rich
phase diagram that includes the superfluid state and the metastable `upper
branch' behavior.

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The categories of this paper are: atom-ph
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The categories of this paper are: solv-int
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
10
The categories of this paper are: q-bio
24
The categories of this paper are: dg-ga
37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th
11
The categories of this paper are: hep-lat
9
The categories of this paper are: nlin
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The categories of this paper are: funct-an
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The categories of this paper are: cmp-lg
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The categories of this paper are: q-fin
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The categories of this paper are: bayes-an
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys