Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum interference between photons from an atomic ensemble and a
  remote atomic ion   Advances in the distribution of quantum information will likely require
entanglement shared across a hybrid quantum network. Many entanglement
protocols require the generation of indistinguishable photons between the
various nodes of the network. This is challenging in a hybrid environment due
to typically large differences in the spectral and temporal characteristics of
single photons generated in different systems. Here we show, for the first
time, quantum interference between photons generated from a single atomic ion
and an atomic ensemble, located in different buildings and linked via optical
fibre. Trapped ions are leading candidates for quantum computation and
simulation with good matter-to-photon conversion. Rydberg excitations in
neutral-atom ensembles show great promise as interfaces for the storage and
manipulation of photonic qubits with excellent efficiencies. Our measurement of
high-visibility interference between photons generated by these two, disparate
systems is an important building block for the establishment of a hybrid
quantum network.

9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
25
The categories of this paper are: patt-sol
24
The categories of this paper are: dg-ga
6
The categories of this paper are: astro-ph
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
14
The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
20
The categories of this paper are: acc-phys
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas