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Open AccessJournal ArticleDOI

On-demand semiconductor single-photon source with near-unity indistinguishability

TLDR
Pulsed resonance fluorescence has been anticipated as the optimum condition for the deterministic generation of high-quality photons with vanishing effects of dephasing and is generated from a single, microcavity-embedded quantum dot under s-shell excitation with 3 ps laser pulses.
Abstract
Pulse-excited resonance-fluorescence single-photons are generated on demand from a single quantum dot embedded in a microcavity under s-shell excitation with an ultrafast laser source.

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Citations
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Nanowire waveguides launching single photons in a Gaussian mode for ideal fiber coupling

TL;DR: This work embeds a semiconductor quantum dot in a tapered nanowire waveguide and demonstrates a Gaussian emission profile in the far field, thereby addressing a major hurdle for practical implementation of single photon sources in emerging photonic technologies.
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Quantum dot single-photon sources with ultra-low multi-photon probability

TL;DR: In this article, the authors demonstrate that the pulse-length dependence of the multi-photon error rate reveals a quadratic dependence in contrast to the linear dependence of resonantly excited two-level systems.
Journal ArticleDOI

Coherent Generation of Nonclassical Light on Chip via Detuned Photon Blockade.

TL;DR: It is demonstrated that detuning the cavity and quantum-dot resonances enables the generation of high-purity nonclassical light from strongly coupled systems, making high-quality single-photon generation by photon blockade possible with current state-of-the-art samples.
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Toward Scalable Boson Sampling with Photon Loss

TL;DR: This experiment uses a quantum-dot-micropillar single-photon source demultiplexed into up to seven input ports of a 16×16 mode ultralow-loss photonic circuit, and detects three-, four- and fivefold coincidence counts, and demonstrates that boson sampling with a few photons lost can increase the sampling rate.
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Phonon-Assisted Two-Photon Interference from Remote Quantum Emitters.

TL;DR: This work exploits for the first time the full potential of a novel phonon-assisted two-photon excitation scheme, which allows for the generation of highly indistinguishable single photons and entangled photon-pairs, enables push-button biexciton state preparation and outperforms conventional resonant two- phoenix excitation schemes in terms of robustness against environmental decoherence.
References
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Journal ArticleDOI

The quantum internet

TL;DR: In this paper, the authors proposed a method for quantum interconnects, which convert quantum states from one physical system to those of another in a reversible manner, allowing the distribution of entanglement across the network and teleportation of quantum states between nodes.
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Measurement of subpicosecond time intervals between two photons by interference.

TL;DR: A fourth-order interference technique has been used to measure the time intervals between two photons, and by implication the length of the photon wave packet, produced in the process of parametric down-conversion.
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Linear optical quantum computing with photonic qubits

TL;DR: In this article, the authors reviewed the original theory and its improvements, and a few examples of experimental two-qubit gates are given, and the use of realistic components, the errors they induce in the computation, and how these errors can be corrected is discussed.
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A Quantum Dot Single-Photon Turnstile Device

TL;DR: Using pulsed laser excitation of a single quantum dot, a single- photon turnstile device that generates a train of single-photon pulses was demonstrated.
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Photonic quantum technologies

TL;DR: The first quantum technology that harnesses quantum mechanical effects for its core operation has arrived in the form of commercially available quantum key distribution systems as mentioned in this paper, which achieves enhanced security by encoding information in photons such that an eavesdropper in the system can be detected.
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