Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A unitary quantum lattice gas algorithm for two dimensional quantum
  turbulence   Quantum vortex structures and energy cascades are examined for two
dimensional quantum turbulence (2D QT) at zero temperature. A special unitary
evolution algorithm, the quantum lattice gas (QLG) algorithm, is employed to
simulate the Bose-Einstein condensate (BEC) governed by the Gross-Pitaevskii
(GP) equation. A parameter regime is uncovered in which, as in 3D QT, there is
a short Poincar\'e recurrence time. It is demonstrated that such short
recurrence times are destroyed as the nonlinear interaction is strengthened.
The similar loss of Poincar\'e recurrence is also reported in 3D QT [1] Energy
cascades for 2D QT are considered to examine whether 2D QT exhibits inverse
cascades as in 2D classical turbulence. In the parameter regime considered, the
spectra analysis reveals no such dual cascades-dual cascades being a hallmark
of 2D classical turbulence.

31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
9
The categories of this paper are: nlin
18
The categories of this paper are: econ
8
The categories of this paper are: hep-ex
27
The categories of this paper are: comp-gas
16
The categories of this paper are: stat
3
The categories of this paper are: physics
1
The categories of this paper are: cs
5
The categories of this paper are: gr-qc
6
The categories of this paper are: astro-ph
26
The categories of this paper are: bayes-an
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th