Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multiplexed Single Photons from Deterministically Positioned Nanowire
  Quantum Dots   Solid-state quantum emitters are excellent sources of on-demand
indistinguishable or entangled photons and can host long-lived spin memories,
crucial resources for photonic quantum information applications. However, their
scalability remains an outstanding challenge. Here we present a scalable
technique to multiplex streams of photons from multiple independent quantum
dots, on-chip, into a fiber network for use off-chip. Multiplexing is achieved
by incorporating a multi-core fiber into a confocal microscope and spatially
matching the multiple foci, seven in this case, to quantum dots in an array of
deterministically positioned nanowires. First, we report the coherent control
of the emission of biexciton-exciton cascade from a single nanowire quantum dot
under resonant two-photon excitation. Then, as a proof-of-principle
demonstration, we perform parallel spectroscopy on the nanowire array to
identify two nearly identical quantum dots at different positions which are
subsequently tuned into resonance with an external magnetic field. Multiplexing
of background-free single photons from these two quantum dots is then achieved.
Our approach, applicable to all types of quantum emitters, can readily be
scaled up to multiplex $>100$ quantum light sources, providing a breakthrough
in hardware for photonic based quantum technologies. Immediate applications
include quantum communication, quantum simulation, and quantum computation.

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The categories of this paper are: atom-ph
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The categories of this paper are: chao-dyn
6
The categories of this paper are: astro-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: q-fin
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The categories of this paper are: acc-phys
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The categories of this paper are: mtrl-th
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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-lat
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The categories of this paper are: ao-sci
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The categories of this paper are: adap-org
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The categories of this paper are: cs
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The categories of this paper are: chem-ph
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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: eess