Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Flexible Cloud/User-Centric Entanglement and Photon Pair Distribution
  with Synthesizable Optical Router   The practical roll-out of quantum communication technologies in optical
networks and the adoption of novel quantum applications demand the distribution
of single or entangled photons. Flexibility and dynamicity are paramount for
the provision of quantum resources, in order to scale with the number of users
and to meet the demand of complex network architectures. We present a quantum
network architecture that features this degree of reconfigurability, without
being restricted to a rigid physical-layer network based on purely passive
multiplexing componentry. We leverage spectral assets of photon-pair sources,
from the short-wavelength band to the L-band, and agile spatial switching at a
remote optical network node, in order to realize a flexible distribution map
that features different flavors, reaching from cloud-centric to user-centric
quantum connectivity. Photon pair distribution is experimentally demonstrated
between five users in a 17-km reach, tree-shaped optical network, with high
visibility entanglement shared between three users of the network. Simultaneous
distribution of photons to more than one user is enabled and the delivered
photon rate can be dynamically adjusted. Penalty-free operation is confirmed
for integrating a co-existing classical control channel within the quantum.

17
The categories of this paper are: q-fin
14
The categories of this paper are: math-ph
0
The categories of this paper are: hep-ph
29
The categories of this paper are: funct-an
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc
6
The categories of this paper are: astro-ph
30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th