Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Particle Fluctuations in Mesoscopic Bose Systems   Particle fluctuations in mesoscopic Bose systems of arbitrary spatial
dimensionality are considered. Both ideal Bose gases and interacting Bose
systems are studied in the regions above the Bose-Einstein condensation
temperature $T_c$ as well as below this temperature. The strength of particle
fluctuations defines whether the system is stable or not. Stability conditions
depend on the spatial dimensionality $d$ and on the confining dimension $D$ of
the system. The consideration shows that mesoscopic systems, experiencing
Bose-Einstein condensation, are stable when: (i) ideal Bose gas is confined in
a rectangular box of spatial dimension $d>2$ above $T_c$ and in a box of $d>4$
below $T_c$; (ii) ideal Bose gas is confined in a power-law trap of a confining
dimension $D>2$ above $T_c$ and of a confining dimension $D>4$ below $T_c$;
(iii) interacting Bose system is confined in a rectangular box of dimension
$d>2$ above $T_c$, while below $T_c$ particle interactions stabilize the
Bose-condensed system making it stable for $d=3$; (iv) nonlocal interactions
diminish the condensation temperature, as compared with the fluctuations in a
system with contact interactions.

36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
16
The categories of this paper are: stat
20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
11
The categories of this paper are: hep-lat
23
The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph
18
The categories of this paper are: econ
6
The categories of this paper are: astro-ph