Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Low-lying excitations of a trapped rotating Bose-Einstein condensate   We investigate the low-lying excitations of a weakly-interacting,
harmonically-trapped Bose-Einstein condensed gas under rotation, in the limit
where the angular mometum $L$ of the system is much less than the number of the
atoms $N$ in the trap. We show that in the asymptotic limit $N \to \infty$ the
excitation energy, measured from the energy of the lowest state, is given by
$27 N_{3}(N_{3}-1) v_0 /68$, where $N_{3}$ is the number of octupole
excitations and $v_{0}$ is the unit of the interaction energy.

16
The categories of this paper are: stat
28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess
14
The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con
1
The categories of this paper are: cs
13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an