Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On Translational Superfluidity and the Landau Criterion for Trapped Bose
  gases in the Gross-Pitaevski Limit   The two-fluid and Landau criteria for superfluidity are compared for trapped
Bose gases. While the two-fluid criterion predicts translational superfluidity,
it is suggested, on the basis of the homogeneous Gross-Pitaevski limit, that a
necessary part of Landau's criterion, adequate for non-translationally
invariant systems, d oes not hold for trapped Bose gases in the GP limit. As a
consequence, if the compressibility is detected to be very large (infinite by
experimental standards) the two-fluid criterion is seen to be the relevant one
in case the system is a tranlational superfluid, while the Landau criterion is
the relevant one if translational superfluidity is absent.

18
The categories of this paper are: econ
30
The categories of this paper are: q-alg
3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin
21
The categories of this paper are: adap-org
12
The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
15
The categories of this paper are: nucl-ex
34
The categories of this paper are: chem-ph