Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Space-compatible cavity-enhanced single-photon generation with hexagonal
  boron nitride   Sources of pure and indistinguishable single-photons are critical for
near-future optical quantum technologies. Recently, color centers hosted by
two-dimensional hexagonal boron nitride (hBN) have emerged as a promising
platform for high luminosity room temperature single-photon sources. Despite
the brightness of the emitters, the spectrum is rather broad and the
single-photon purity is not sufficient for practical quantum information
processing. Here, we report integration of such a quantum emitter hosted by hBN
into a tunable optical microcavity. A small mode volume of the order of
$\lambda^3$ allows us to Purcell enhance the fluorescence, with the observed
excited state lifetime shortening. The cavity significantly narrows the
spectrum and improves the single-photon purity by suppression of off-resonant
noise. We explore practical applications by evaluating the performance of our
single-photon source for quantum key distribution and quantum computing. The
complete device is compact and implemented on a picoclass satellite platform,
enabling future low-cost satellite-based long-distance quantum networks.

36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
2
The categories of this paper are: math
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th