Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A fiber-coupled diamond quantum nanophotonic interface   Color centers in diamond provide a promising platform for quantum optics in
the solid state, with coherent optical transitions and long-lived electron and
nuclear spins. Building upon recent demonstrations of nanophotonic waveguides
and optical cavities in single-crystal diamond, we now demonstrate on-chip
diamond nanophotonics with a high efficiency fiber-optical interface, achieving
> 90% power coupling at visible wavelengths. We use this approach to
demonstrate a bright source of narrowband single photons, based on a
silicon-vacancy color center embedded within a waveguide-coupled diamond
photonic crystal cavity. Our fiber-coupled diamond quantum nanophotonic
interface results in a high flux of coherent single photons into a single mode
fiber, enabling new possibilities for realizing quantum networks that interface
multiple emitters, both on-chip and separated by long distances.

30
The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol
5
The categories of this paper are: gr-qc
6
The categories of this paper are: astro-ph
16
The categories of this paper are: stat
0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
19
The categories of this paper are: eess