Raman Storage of Quasideterministic Single Photons Generated by Rydberg Collective Excitations in a Low-Noise Quantum Memory

Heller, Lukas; Lowinski, Jan; Theophilo, Klara; Padrón-Brito, Auxiliadora; Riedmatten, Hugues de

doi:10.1103/physrevapplied.18.024036

Cited by 13 publications

(7 citation statements)

References 70 publications

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“…The overall framework presented here is relevant to other combinations of hardware besides the specific example analyzed in this work. Efficient single-spin photon transducers can be realized with diamond defect centers [6] and quantum dot systems [76], which can be matched with other ensemble-based memories based on AFC [44], Raman [77] or EIT [42] storage using impuritydoped crystals [54,78] or atoms, either laser-cooled or at room temperature. We note that different hardware combinations may require frequency conversion to be compatible, which can be achieved through standard techniques based on non-linear waveguides [6,28,79,80].…”

Section: Discussionmentioning

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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Section: Discussionmentioning

confidence: 99%

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

Borregaard,

et al. 2024

Preprint

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“…This is due to a combination of several factors such as imperfect preparation of the memory, leakage from the strong control pulses and resonant four wave mixing noise. The probability of emitting a noise photon per storage trial, p n , is around 10 −3 for REID QMs [54,55] whereas ∼ 10 −4 has been achieved with laser cooled gases [56].…”

Section: Appendix B: Incoherent Clicksmentioning

confidence: 99%

Time-delayed single quantum repeater node for global quantum communications with a single satellite

Gündoğan¹,

Sidhu²,

Oi³

et al. 2023

Preprint

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Quantum networking on a global scale is an immensely challenging endeavor that is fraught with significant technical and scientific obstacles. While various types of quantum repeaters have been proposed they are typically limited to distances of a few thousand kilometers or require extensive hardware overhead. Recent proposals suggest that space-borne quantum repeaters composed of a small number of satellites carrying on-board quantum memories would be able to cover truly global distances. In this paper, we propose an alternative to such repeater constellations using an ultra-long lived quantum memory in combination with a second memory with a shorter storage time. This combination effectively acts as a time-delayed version of a single quantum repeater node. We investigate the attainable finite key rates and demonstrate an improvement of at least three orders of magnitude over prior single-satellite methods that rely on a single memory, while simultaneously reducing the necessary memory capacity by the same amount. We conclude by suggesting an experimental platform to realize this scheme.

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“…Optical absorptive quantum memories were first demonstrated with cold atomic gases [85] and room-temperature atomic gases, [86] based on the electromagnetically induced transparency (EIT) protocol. [87,88] Other available photonic storage protocols include dynamically controlled Autler-Townes splitting, [89,90] offresonance Raman interaction, [91][92][93][94] and gradient echo memory (GEM). [95][96][97] Such atomic-ensemble-based approach can provide an ensemble enhanced light-atom interaction, and a quantum storage efficiency up to 92% has been reported with EITbased memories in cold atomic gases.…”

Section: Atomic Gasesmentioning

confidence: 99%

Photonic Integrated Quantum Memory in Rare‐Earth Doped Solids

Zhou,

Liu,

et al. 2023

Laser & Photonics Reviews

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An optical quantum memory is a device that can store photonic quantum information and release it after a controlled time. It is an essential component for overcoming channel losses in large‐scale quantum networks. Optical quantum memories have been demonstrated with various physical systems including atomic gases, single atoms in optical cavities, and rare‐earth‐ion doped solids. Now, quantum memories are marching toward miniaturization and integration for large‐scale practical applications. Solid state systems stand as a natural choice due to the physical stability and ease of micro or nano fabrication using well‐established techniques. In the past decade, considerable efforts have been devoted to developing photonic integrated quantum memories, that is, quantum memories based on micro/nano‐photonic structures manufactured in solids. Remarkable performances have been achieved with integrated quantum memories, with the advantages of lower laser/electric power requirements, small volumes, large storage densities, and easy implementations. In this article, the basic concepts of optical quantum memories, the state‐of‐the‐art technologies for fabricating integrated quantum memories in rare‐earth ions doped crystals, and recent advances are introduced, and the roadmap for developing practically useful devices for applications in quantum networks is discussed.

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Raman Storage of Quasideterministic Single Photons Generated by Rydberg Collective Excitations in a Low-Noise Quantum Memory

Cited by 13 publications

References 70 publications

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

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

Time-delayed single quantum repeater node for global quantum communications with a single satellite

Photonic Integrated Quantum Memory in Rare‐Earth Doped Solids

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