Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Talbot self-imaging and two-photon interference in ring-core fibers   Wave propagation on the surface of cylinders exhibits interferometric self
imaging, much like the Talbot effect in the near-field diffraction at periodic
gratings. We report the experimental observation of the cylindrical Talbot
carpet in weakly-guiding ring-core fibers for classical light fields. We
further show that the ring-core fiber acts as a high-order optical beamsplitter
for single photons, whose output can be controlled by the relative phase
between the input light fields. By also demonstrating high-quality two-photon
interference between indistinguishable photons sent into the ring-core fiber,
our findings open the door to applications in optical telecommunications as a
compact beam multiplexer as well as in quantum information processing tasks as
a scalable realization of a linear optical network.

14
The categories of this paper are: math-ph
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin
24
The categories of this paper are: dg-ga
2
The categories of this paper are: math
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
18
The categories of this paper are: econ
34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
15
The categories of this paper are: nucl-ex
0
The categories of this paper are: hep-ph
22
The categories of this paper are: chao-dyn
30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int