Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Heralded single excitation of atomic ensemble via solid-state-based
  telecom photon detection   Telecom photonic quantum networks with matter quantum systems enable a rich
variety of applications, such as a long distance quantum cryptography and
one-way quantum computing. Preparation of a heralded single excitation (HSE) in
an atomic ensemble by detecting a telecom wavelength photon having a
correlation with the atomic excitation is an important step. Such a system has
been demonstrated with a quantum frequency conversion (QFC) to telecom
wavelength employing a Rb atomic cloud. However the limited wavelength
selection prevents the next step. Here we for the first time demonstrate HSE
with a solid-state-based QFC and a detector for a telecom wavelength that will
have a great advantage of the utility of mature telecom technologies. We
unambiguously show that the demonstrated HSE indicates a non-classical
statistics by the direct measurement of the autocorrelation function.

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The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
2
The categories of this paper are: math
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess
15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
24
The categories of this paper are: dg-ga