Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Linearons: highly non-instantaneous solitons in liquid-core photonic
  crystal fibers   The nonlinear propagation of light pulses in liquid-filled photonic crystal
fibers is considered. Due to the slow reorientational nonlinearity of some
molecular liquids, the nonlinear modes propagating inside such structures can
be approximated, for pulse durations much shorter than the molecular relaxation
time, by temporally highly-nonlocal solitons, analytical solutions of a linear
Schroedinger equation. The physical relevance of these novel solitary
structures, which may have a broad range of applications, is discussed and
supported by detailed numerical simulations.

6
The categories of this paper are: astro-ph
35
The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
34
The categories of this paper are: chem-ph
4
The categories of this paper are: cond-mat
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
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The categories of this paper are: nucl-ex
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org