Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nonlinear quantum piston for the controlled generation of vortex rings
  and soliton trains   We propose a simple way to generate nonlinear excitations in a controllable
way by managing interactions in Bose-Einstein condensates. Under the action of
a quantum analogue of a classical piston the condensed atoms are pushed through
the trap generating vortex rings in a fully three- dimensional condensates or
soliton trains in quasi-one dimensional scenarios. The vortex rings form due to
transverse instability of the shock wave train enhanced and supported by the
energy transfer between waves. We elucidate in which sense the
self-interactions within the atom cloud define the properties of generated
vortex rings and soliton trains. Based on the quantum piston scheme we study
the behavior of two component Bose-Einstein condensates and analyze how the
presence of an additional superfluid influences the generation of vortex rings
or solitons in the other component and vice versa. Finally, we show the
dynamical emergence of skyrmions within two component systems in the immiscible
regime.

36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con
19
The categories of this paper are: eess
10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga
11
The categories of this paper are: hep-lat
22
The categories of this paper are: chao-dyn
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
7
The categories of this paper are: hep-th
18
The categories of this paper are: econ
21
The categories of this paper are: adap-org
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg