Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Free-space communication through turbulence: a comparison of plane-wave
  and orbital-angular-momentum encodings   Free-space communication allows one to use spatial mode encoding, which is
susceptible to the effects of diffraction and turbulence. Here, we discuss the
optimum communication modes of a system while taking such effects into account.
We construct a free-space communication system that encodes information onto
the plane-wave (PW) modes of light. We study the performance of this system in
the presence of atmospheric turbulence, and compare it with previous results
for a system employing orbital-angular-momentum (OAM) encoding. We are able to
show that the PW basis is the preferred basis set for communication through
atmospheric turbulence for a large Fresnel number system. This study has
important implications for high-dimensional quantum key distribution systems.

9
The categories of this paper are: nlin
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
2
The categories of this paper are: math
4
The categories of this paper are: cond-mat
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys
5
The categories of this paper are: gr-qc
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
6
The categories of this paper are: astro-ph
7
The categories of this paper are: hep-th
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph