Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Modular architecture of large-scale optical interferometers for sparsely
  populated input   Today, the realization of large optical interferometer schemes is necessary
for many sophisticated information processing algorithms. In this work, we
propose a modular interferometer architecture possible when the number of input
channels of a transformation populated with signals is much lesser than the
total number of its channels. The underlying idea is to split the
transformation into two stages. In the first stage, the signals undergo
scattering among multiple channels of separate optical schemes, while in the
second stage, they are made to interfere with each other, thus, we call it the
mixing stage. This way, large-scale transformations that technically
challenging to fabricate even by means of the mature integrated photonics
technology, can be realized using multiple low-depth optical circuits, yet at
the expense of single interconnection between the scattering and mixing parts
of the interferometer. Although non-universal, as witnessed by the parameters
set to define the interferometer, the architecture provides a viable approach
to construction of large-scale interferometers.

18
The categories of this paper are: econ
19
The categories of this paper are: eess
11
The categories of this paper are: hep-lat
27
The categories of this paper are: comp-gas
23
The categories of this paper are: solv-int
17
The categories of this paper are: q-fin
29
The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg
32
The categories of this paper are: atom-ph
28
The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph