Telecom-Wavelength Quantum Repeater Node Based on a Trapped-Ion Processor

Krutyanskiy, V. L.; Canteri, Marco; Meraner, Martin; Bate, James; Krcmarsky, Vojtech; Schupp, Josef; Sangouard, Nicolas; Lanyon, B. P.

doi:10.1103/physrevlett.130.213601

Cited by 23 publications

(2 citation statements)

References 60 publications

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“…To fully realize the potential of QKD, it is necessary to build a QKD network enabling both long-distance and shortrange quantum systems that support both fixed nodes and mobile terminals. QKD over the optical wireless channel has been actively researched over recent decades since it is believed to complement the limitation of the conventional fiberoptic-based QKD [351], [354]- [358]. In 2017, researchers in [354] successfully demonstrated a long-distance free-space QKD with an intercontinental distance of 7400 km.…”

Section: Qkdmentioning

confidence: 99%

Optical Wireless Communications: Illuminating the Path for Cooper's Law

Eltokhey,

Bashir,

Younus

et al. 2024

Preprint

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Section: Qkdmentioning

confidence: 99%

Optical Wireless Communications: Illuminating the Path for Cooper's Law

Eltokhey,

Bashir,

Younus

et al. 2024

Preprint

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“…Different quantum hardware such as solid-state defect centers [5,6], atomic ensembles [7][8][9], trapped ions [10,11] and quantum dots [12] are currently being developed to enable a functional quantum repeater. There exist numerous theoretical proposals for repeater architectures tailored to the specific features of each hardware [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Hybrid Quantum Repeaters with Ensemble-based Quantum Memories and Single-spin Photon Transducers

Borregaard,

et al. 2024

Preprint

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Reliable quantum communication over hundreds of kilometers is a daunting yet necessary requirement for a quantum internet. To overcome photon loss, the deployment of quantum repeater stations between distant network nodes is necessary. A plethora of different quantum hardware is being developed for this purpose, each platform with its own opportunities and challenges. Here, we propose to combine two promising hardware platforms in a hybrid quantum repeater architecture to lower the cost and boost the performance of long-distance quantum communication. We outline how ensemble-based quantum memories combined with single-spin photon transducers, which can transfer quantum information between a photon and a single spin, can facilitate massive multiplexing, efficient photon generation, and quantum logic for amplifying communication rates. As a specific example, we describe how a single Rubidium (Rb) atom coupled to nanophotonic resonators can function as a high-rate, telecom-visible entangled photon source with the visible photon being compatible with storage in a Thulium-doped crystal memory (Tm-memory) and the telecom photon being compatible with low loss fiber propagation. We experimentally verify that Tm and Rb transitions are in resonance with each other. Our analysis shows that by employing up to 9 repeater stations, each equipped with two Tm-memories capable of holding up to 625 storage modes, along with four single Rb atoms, one can reach a quantum communication rate of about 10 secret bits per second across distances of up to 1000 km.

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Two‐Stage, Low Noise Quantum Frequency Conversion of Single Photons from Silicon‐Vacancy Centers in Diamond to the Telecom C‐Band

Schäfer,

Kambs,

Herrmann

et al. 2023

Adv Quantum Tech

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The silicon‐vacancy center in diamond holds great promise as a qubit for quantum communication networks. However, since the optical transitions are located within the visible red spectral region, quantum frequency conversion to low‐loss telecommunication wavelengths becomes a necessity for its use in long‐range, fiber‐linked networks. This work presents a highly efficient, low‐noise quantum frequency conversion device for photons emitted by a silicon‐vacancy (SiV) center in diamond to the telecom C‐band. By using a two‐stage difference‐frequency mixing scheme, spontaneous parametric down‐conversion (SPDC) noise is circumvented and Raman noise is minimized, resulting in a very low noise rate of 10.4 ± 0.7 photons per second as well as an overall device efficiency of 35.6%. By converting single photons from SiV centers, it demonstrates the preservation of photon statistics upon conversion.

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Telecom-Wavelength Quantum Repeater Node Based on a Trapped-Ion Processor

Cited by 23 publications

References 60 publications

Optical Wireless Communications: Illuminating the Path for Cooper's Law

Optical Wireless Communications: Illuminating the Path for Cooper's Law

Hybrid Quantum Repeaters with Ensemble-based Quantum Memories and Single-spin Photon Transducers

Two‐Stage, Low Noise Quantum Frequency Conversion of Single Photons from Silicon‐Vacancy Centers in Diamond to the Telecom C‐Band

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