Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Instabilities in binary mixtures of one-dimensional quantum degenerate
  gases   We show that one-dimensional binary mixtures of bosons or of a boson and a
spin-polarized fermion are Luttinger liquids with the following instabilities:
i) For different particle densities, strong attraction between the mixture
components leads to collapse, while strong repulsion leads to demixing, ii) For
a low-density mixture of two gases of impenetrable bosons (or a spin-polarized
fermion and an impenetrable boson) of equal densities, the system develops a
gap and exhibits enhanced pairing fluctuations when there is attraction between
the components. In the boson-fermion mixture, the pairing fluctuations occur at
finite momentum. Our conclusions apply to mixtures both on the continuum and on
optical lattices away from integer or fractional commensurability.

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The categories of this paper are: ao-sci
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The categories of this paper are: q-bio
3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph
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The categories of this paper are: plasm-ph
27
The categories of this paper are: comp-gas
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The categories of this paper are: eess
37
The categories of this paper are: supr-con
2
The categories of this paper are: math
18
The categories of this paper are: econ
7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
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The categories of this paper are: solv-int
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The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc