Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spectroscopy of the soliton lattice formation in quasi-one-dimensional
  fermionic superfluids with population imbalance   Motivated by recent experiments in low-dimensional trapped fermionic
superfluids, we study a quasi-one-dimensional (quasi-1D) superfluid with a
population imbalance between two hyperfine states using an exact mean-field
solution for the order parameter. When an effective "magnetic field" exceeds a
critical value, the superfluid order parameter develops spatial inhomogeneity
in the form of a soliton lattice. The soliton lattice generates a band of
quasiparticle states inside the energy gap, which originate from the Andreev
bound states localized at the solitons. Emergence of the soliton lattice is
accompanied by formation of a spin-density wave, with the majority fermions
residing at the points in space where the Fulde-Ferrell-Larkin-Ovchinnikov
(FFLO) order parameter vanishes. We discuss possibilities for experimental
detection of the quasi-1D FFLO state using elastic and inelastic optical Bragg
scattering and radio-frequency spectroscopy. We show that these measurements
can provide necessary information for unambiguous identification of the
spatially-inhomogeneous quasi-1D FFLO state and the soliton lattice formation.

27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
32
The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
24
The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
12
The categories of this paper are: nucl-th
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
2
The categories of this paper are: math