Coherent Spin-Photon Interface with Waveguide Induced Cycling Transitions

Appel, Martin Hayhurst; Tiranov, Alexey; Javadi, Alisa; Löbl, Matthias C.; Wang, Ying; Scholz, Sven; Wieck, A. D.; Ludwig, Arne; Warburton, Richard J.; Lodahl, Peter

doi:10.1103/physrevlett.126.013602

Cited by 38 publications

(49 citation statements)

References 50 publications

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“…Thanks to mature GaAs fabrication technology, our QD-spin system could be further combined with cavities and other photonic structures. This in turn might allow increasing the photon collection efficiency, speed up the spin-initialization process and achieve high optical transition cyclicity 51 for singleshot read-out. Further performance improvement could be achieved by utilizing an n-i-p diode structure, which was shown to allow trapping the charge state via Coulomb blockade, tuning the emission frequency using gate voltage and reducing the charge noise 50 .…”

Section: Discussionmentioning

confidence: 99%

Optical charge injection and coherent control of a quantum-dot spin-qubit emitting at telecom wavelengths

et al. 2022

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Solid-state quantum emitters with manipulable spin-qubits are promising platforms for quantum communication applications. Although such light-matter interfaces could be realized in many systems only a few allow for light emission in the telecom bands necessary for long-distance quantum networks. Here, we propose and implement an optically active solid-state spin-qubit based on a hole confined in a single InAs/GaAs quantum dot grown on an InGaAs metamorphic buffer layer emitting photons in the C-band. We lift the hole spin-degeneracy using an external magnetic field and demonstrate hole injection, initialization, read-out and complete coherent control using picosecond optical pulses. These results showcase a solid-state spin-qubit platform compatible with preexisting optical fiber networks.

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Section: Discussionmentioning

confidence: 99%

Optical charge injection and coherent control of a quantum-dot spin-qubit emitting at telecom wavelengths

et al. 2022

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“…The four linear dipoles are driven by a red-detuned Raman laser to rotate the spin qubit [20] while the PCW (FIG. 1b) selectively enhances the optical transitions resulting in the optical cyclicity C = γ y /γ x = 14.7 ± 0.2 [21], which is otherwise unity in a bulk environment. Spinphoton entanglement is then generated according to the protocol in FIG.…”

mentioning

confidence: 99%

“…The entanglement protocol builds upon our recent work on uniting optical cycling transitions with optical spin control [21], as summarised in FIG. 1a.…”

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confidence: 99%

A Source of Indistinguishable Time-Bin Entangled Photons from a Waveguide-Embedded Quantum Dot

Appel,

Tiranov,

Pabst

et al. 2021

Preprint

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Deterministic sources of multi-photon entanglement are highly attractive for quantum information processing but are challenging to realize experimentally. In this paper, we demonstrate a route towards a scaleable source of time-bin encoded Greenberger-Horne-Zeilinger and linear cluster states from a solid-state quantum dot embedded in a nanophotonic crystal waveguide. By utilizing a selfstabilizing double-pass interferometer, we measure a spin-photon Bell state with (67.8±0.4)% fidelity and devise steps for significant further improvements. By employing strict resonant excitation, we demonstrate a photon indistinguishability of (95.7 ± 0.8)%, which is conducive to fusion of multiple cluster states for scaling up the technology and producing more general graph states.

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“…A solidstate quantum emitter deterministically coupled to a cavity or waveguide is an attractive source of on-demand single photons. In particular, self-assembled InAs quantum dots (QDs) in GaAs offer a mature technology for photon generation and a platform for interfacing electron spin and photons in which the decoherence and noise processes have been identified and reduced [2][3][4][5][6]. Despite the excellent performance, a major drawback of InAs-based QD emitters is that the emission wavelength is typically in the range of 900-950 nm.…”

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confidence: 99%

A Pure and indistinguishable single-photon source at telecommunication wavelength

Lio¹,

Carlos²,

Zhou³

et al. 2022

Preprint

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On-demand single-photon sources emitting pure and indistinguishable photons at the telecommunication wavelength are a critical asset towards the deployment of fiber-based quantum networks. Indeed, single photons may serve as flying qubits, allowing communication of quantum information over long distances. Self-assembled InAs quantum dots embedded in GaAs constitute an excellent nearly deterministic source of high quality single photons, but the vast majority of sources operate in the 900-950 nm wavelength range, precluding their adoption in a quantum network. Here, we present a quantum frequency conversion scheme for converting single photons from quantum dots to the telecommunication C band, around 1550 nm, achieving 40.8% end-to-end efficiency, while maintaining both high purity and a high degree of indistinguishability during conversion with measured values of g (2) (0) = 2.4% and V (corr) = 94.8%, respectively.

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Coherent Spin-Photon Interface with Waveguide Induced Cycling Transitions

Cited by 38 publications

References 50 publications

Optical charge injection and coherent control of a quantum-dot spin-qubit emitting at telecom wavelengths

Optical charge injection and coherent control of a quantum-dot spin-qubit emitting at telecom wavelengths

A Source of Indistinguishable Time-Bin Entangled Photons from a Waveguide-Embedded Quantum Dot

A Pure and indistinguishable single-photon source at telecommunication wavelength

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