Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Two-dimensional supersolidity in a circular trap   Dipolar condensates have recently been coaxed into supersolid phases
supporting both superfluid and crystal excitations. While one-dimensional (1D)
supersolids may be prepared via a roton instability, we find that such a
procedure in two dimensions (2D) leads to greater heating. We go on to show
that 2D roton modes have little in common with the supersolid configuration:
instead, unstable centralized rotons trigger a process of nonlinear crystal
growth. By evaporatively cooling directly into the supersolid phase--hence
bypassing the first-order roton instability--we experimentally produce a 2D
supersolid in a near-circular trap. We develop a stochastic Gross-Pitaevskii
theory that includes beyond-meanfield effects to further explore the formation
process. We calculate the static structure factor for a 2D supersolid, and
compare to a 1D array. These results provide insight into the process of
supersolid formation in 2D, and define a realistic path to the formation of
large two-dimensional supersolid arrays.

5
The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
20
The categories of this paper are: acc-phys
21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
15
The categories of this paper are: nucl-ex
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
2
The categories of this paper are: math
33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph