Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: High-fidelity operation of quantum photonic circuits   We demonstrate photonic quantum circuits that operate at the stringent levels
that will be required for future quantum information science and technology.
These circuits are fabricated from silica-on-silicon waveguides forming
directional couplers and interferometers. While our focus is on the operation
of quantum circuits, to test this operation required construction of a
spectrally tuned photon source to produce near-identical pairs of photons. We
show non-classical interference with two photons and a two-photon entangling
logic gate that operate with near-unit fidelity. These results are a
significant step towards large-scale operation of photonic quantum circuits.

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The categories of this paper are: gr-qc
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The categories of this paper are: solv-int
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The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
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The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
28
The categories of this paper are: alg-geom
34
The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th
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The categories of this paper are: bayes-an
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The categories of this paper are: cond-mat
29
The categories of this paper are: funct-an
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The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
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The categories of this paper are: math
10
The categories of this paper are: q-bio