Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spatial coherence singularities of a vortex field in nonlinear media   We study the spatial coherence properties of optical vortices generated by
partially incoherent light in self-focusing nonlinear media. We reveal the
existence of phase singularities in the spatial coherence function of a vortex
field that can characterize the stable propagation of vortices through
nonlinear media.

19
The categories of this paper are: eess
7
The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph
36
The categories of this paper are: cmp-lg
12
The categories of this paper are: nucl-th
23
The categories of this paper are: solv-int
37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex