Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Variational theory for the ground state and collective excitations of an
  elongated dipolar condensate   We develop a variational theory for a dipolar condensate in an elongated
(cigar shaped) confinement potential. Our formulation provides an effective
one-dimensional extended meanfield theory for the ground state and its
collective excitations. We apply our theory to investigate the properties of
rotons in the system comparing the variational treatment to a full numerical
solution. We consider the effect of quantum fluctuations on the scattering
length at which the roton excitation softens to zero energy.

20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc
15
The categories of this paper are: nucl-ex
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
24
The categories of this paper are: dg-ga
0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol
18
The categories of this paper are: econ