Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comment on ``Low-dimensional Bose liquids: beyond the Gross-Pitaevskii
  approximation''   This is a comment on the work of Kolomeisky et al., Phys. Rev. Lett. 85, 1146
(2000). We point out that they are using the wrong form of the energy
functional for one-dimensional fermions. We point out two possible forms of the
energy functional, both of which can be derived from first principles but using
different methods. One is obtained from the collective field theory method,
while the other is derived from the extended Thomas-Fermi method. These two
forms of the energy functional do not support the soliton solutions which are
obtained by Kolomeisky et al.

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The categories of this paper are: comp-gas
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The categories of this paper are: solv-int
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The categories of this paper are: chem-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: nucl-ex
6
The categories of this paper are: astro-ph
10
The categories of this paper are: q-bio
3
The categories of this paper are: physics
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
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The categories of this paper are: econ
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The categories of this paper are: q-alg
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The categories of this paper are: funct-an
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The categories of this paper are: quant-ph
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The categories of this paper are: patt-sol
16
The categories of this paper are: stat