Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Onset time for energy oscillations in a two-dimensional trapped Bose gas
  excited by a red laser potential   We explore the energy dynamics of a two dimensional (2D) harmonically trapped
Bose-Einstein condensate inside a box potential, excited by a moving
red-detuned laser potential (RDLP). For an RDLP velocity $v$ less than a
critical value $v_c$, energy oscillations are observed to begin simultaneously
with the motion of the RDLP. For $v > v_c$, these oscillations are delayed
through a transient in the energy. At the end of the delay time $t_{ons}$, the
energy oscillations are regenerated again, and $t_{ons}$ is found to depend on
$v$ through universal relations for two cases: one for an RDLP depth sufficient
to break off a BEC fragment, another for a depth insufficient to split the BEC.
In the case of splitting, $t_{ons}$ exactly equals the time it takes the BEC
fragment (dragged by the RDLP trough) to reach the hard wall of the box
potential.

33
The categories of this paper are: plasm-ph
34
The categories of this paper are: chem-ph
13
The categories of this paper are: quant-ph
20
The categories of this paper are: acc-phys
6
The categories of this paper are: astro-ph
9
The categories of this paper are: nlin
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
2
The categories of this paper are: math
27
The categories of this paper are: comp-gas
15
The categories of this paper are: nucl-ex
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex