Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Properties of low density quantum fluids within nanopores   The behavior of quantum fluids (4He and H2) within nanopores is explored in
various regimes, using several different methods. A focus is the evolution of
each fluid's behavior as pore radius R is increased. Results are derived with
the path integral Monte Carlo method for the finite temperature (T) behavior of
quasi-one-dimensional (1D) liquid 4He and liquid H2, within pores of varying R.
Results are also obtained, using a density functional method, for the T=0
behavior of 4He in pores of variable R.

34
The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc
7
The categories of this paper are: hep-th
13
The categories of this paper are: quant-ph
32
The categories of this paper are: atom-ph
21
The categories of this paper are: adap-org
23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
26
The categories of this paper are: bayes-an
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th