Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Concatenated Capacity-Achieving Polar Codes for Optical Quantum Channels   We construct concatenated capacity-achieving quantum codes for noisy optical
quantum channels. We demonstrate that the error-probability of
capacity-achieving quantum polar encoding can be reduced by the proposed
low-complexity concatenation scheme.

28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
18
The categories of this paper are: econ
9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas
32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga
19
The categories of this paper are: eess
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
8
The categories of this paper are: hep-ex
6
The categories of this paper are: astro-ph
10
The categories of this paper are: q-bio