Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: All-Optical Routing of Single Photons by a One-Atom Switch Controlled by
  a Single Photon   The prospect of quantum networks, in which quantum information is carried by
single photons in photonic circuits, has long been the driving force behind the
effort to achieve all-optical routing of single photons. Here we realize the
most basic unit of such a photonic circuit: a single-photon activated switch,
capable of routing a photon from any of its two inputs to any of its two
outputs. Our device is based on a single 87Rb atom coupled to a fiber-coupled,
chip-based microresonator, and is completely all-optical, requiring no other
fields beside the in-fiber single-photon pulses. Nonclassical statistics of the
control pulse confirm that a single reflected photon toggles the switch from
high reflection (65%) to high transmission (90%), with average of ~1.5 control
photons per switching event (~3 including linear losses). The fact that the
control and target photons are both in-fiber and practically identical makes
this scheme compatible with scalable architectures for quantum information
processing.

14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
28
The categories of this paper are: alg-geom
2
The categories of this paper are: math
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-lat
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The categories of this paper are: solv-int
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The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: bayes-an