Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Particle number fractionalization of a one-dimensional atomic Fermi gas
  with synthetic spin-orbit coupling   We propose an experimental scheme to simulate the fractionalization of
particle number by using a one-dimensional spin-orbit coupled ultracold
fermionic gas. The wanted spin-orbit coupling, a kink-like potential, and a
conjugation-symmetry-breaking mass term are properly constructed by laser-atom
interactions, leading to an effective low-energy relativistic Dirac Hamiltonian
with a topologically nontrivial background field. The designed system supports
a localized soliton excitation with a fractional particle number that is
generally irrational and experimentally tunable, providing a direct realization
of the celebrated generalized-Su-Schrieffer-Heeger model. In addition, we
elaborate on how to detect the induced soliton mode with the FPN in the system.

16
The categories of this paper are: stat
19
The categories of this paper are: eess
11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
5
The categories of this paper are: gr-qc
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
6
The categories of this paper are: astro-ph
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
9
The categories of this paper are: nlin