Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Helium nanodroplets and trapped Bose-Einstein condensates as prototypes
  of finite quantum fluids   Helium nanodroplets and trapped Bose-Einstein condensates in dilute atomic
gases offer complementary views of fundamental aspects of quantum many-body
systems. We discuss analogies and differences, stressing their common
theoretical background and peculiar features. We briefly review some relevant
concepts, such as the meaning of superfluidity in finite systems, the behavior
of elementary excitations and collective modes, as well as rotational
properties and quantized vorticity.

32
The categories of this paper are: atom-ph
6
The categories of this paper are: astro-ph
15
The categories of this paper are: nucl-ex
0
The categories of this paper are: hep-ph
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
3
The categories of this paper are: physics
19
The categories of this paper are: eess
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph