Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Detection of two-mode spatial quantum states of light by electro-optic
  integrated directional couplers   We study both manipulation and detection of two-mode spatial quantum states
of light by means of a reconfigurable integrated device built in an
electro-optical material in a Kolgelnik-Schmidt configuration, which provides
higher error tolerance to fabrication defects and larger integration density
than other current schemes. SU(2) transformations are implemented on guided
spatial modes in such a way that reconstruction of both the optical
field-strength quantum probability distribution, via spatial two-mode homodyne
detection, and the full optical field-strength wavefunction, by means of weak
values, are carried out. This approach can easily be extended to spatial N-mode
input quantum states. Apart from its usefulness to characterize optical quantum
states, it is also emphasized its application to the measurement of the
so-called generalized quantum polarization.

24
The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org
6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
17
The categories of this paper are: q-fin
16
The categories of this paper are: stat