Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Formation of dynamical Schr\"odinger cats in low-dimensional ultracold
  attractive Bose gases   Dynamical Schr\"odinger cats can be formed when a one-dimensional attractive
Bose-gas cloud is scattered off a potential barrier. Once formed, these objects
are stable in time. The phenomenon and its mechanism -- transformation of
kinetic energy to internal energy of the scattered atomic cloud -- are obtained
by solving the time-dependent many-boson Schr\"odinger equation. Implications
are discussed.

14
The categories of this paper are: math-ph
6
The categories of this paper are: astro-ph
23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an
22
The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph