A quantum router architecture for high-fidelity entanglement flows in quantum networks

Yuan, Liu; Bersin, Eric; Dahlberg, Axel; Wehner, Stephanie; Englund, Dirk

doi:10.1038/s41534-022-00582-8

“…Additionally, the reversible and coherent spin-photon coupling could in principle enable on-chip entanglement routing, thus potentially improving the communication rate [492]. Alternatively, coupling of spins to propagating phonons has been proposed as a means to implement scalable, high-fidelity and hybrid on-chip quantum networks [408], [409].…”

Section: A Robust Qubitsmentioning

confidence: 99%

Diamond Integrated Quantum Nanophotonics: Spins, Photons and Phonons

Shandilya

¹

,

Flågan

²

,

Carvalho

³

et al. 2022

J. Lightwave Technol.

View full text Add to dashboard Cite

Integrated quantum photonics devices in diamond have tremendous potential for many quantum applications, including long-distance quantum communication, quantum information processing, and quantum sensing. These devices benefit from diamond's combination of exceptional thermal, optical, and mechanical properties. Its wide electronic bandgap makes diamond an ideal host for a variety of optical active spin qubits that are key building blocks for quantum technologies. In landmark experiments, diamond spin qubits have enabled demonstrations of remote entanglement, memory-enhanced quantum communication, and multi-qubit spin registers with fault-tolerant quantum error correction, leading to the realization of multinode quantum networks. These advancements put diamond at the forefront of solid-state material platforms for quantum information processing. Recent developments in diamond nanofabrication techniques provide a promising route to further scaling of these landmark experiments towards real-life quantum technologies. In this paper, we focus on the recent progress in creating integrated diamond quantum photonic devices, with particular emphasis on spin-photon interfaces, cavity optomechanical devices, and spin-phonon transduction. Finally, we discuss prospects and remaining challenges for the use of diamond in scalable quantum technologies.

show abstract

“…Note that research on the PbV center is still in the early stages and key parameters remain to be determined with consistency [444]. Additionally, the reversible and coherent spin-photon coupling could, in principle, enable on-chip entanglement routing, thus potentially improving the communication rate [447]. Alternatively, coupling of spins to propagating phonons has been proposed as a means to implement scalable, high-fidelity and hybrid on-chip quantum networks [437], [438].…”

Section: A Robust Qubitsmentioning

confidence: 99%

Diamond Integrated Quantum Photonics: A Review

Shandilya,

Flågan,

Carvalho

et al. 2022

Preprint

0

View full text Add to dashboard Cite

Integrated quantum photonics devices in diamond have tremendous potential for many quantum applications, including long-distance quantum communication, quantum information processing, and quantum sensing. These devices benefit from diamond's combination of exceptional thermal, optical, and mechanical properties. Its wide electronic bandgap makes diamond an ideal host for a variety of optical active spin qubits that are key building blocks for quantum technologies. In landmark experiments, diamond spin qubits have enabled demonstrations of remote entanglement, memory-enhanced quantum communication, and multi-qubit spin registers with fault-tolerant quantum error correction, leading to the realization of multinode quantum networks. These advancements put diamond at the forefront of solid-state material platforms for quantum information processing. Recent developments in diamond nanofabrication techniques provide a promising route to further scaling of these landmark experiments towards real-life quantum technologies. In this paper, we focus on the recent progress in creating integrated diamond quantum photonic devices, with particular emphasis on spin-photon interfaces, cavity optomechanical devices, and spin-phonon transduction. Finally, we discuss prospects and remaining challenges for the use of diamond in scalable quantum technologies.

show abstract

“…6 These applications motivate the need for a distributed infrastructure (quantum network) that will supply high quality (fidelity) bipartite and multipartite entanglements to groups of end users; [7][8][9][10][11] a quantum network consists of a collection of quantum switches connected to each other through optical links. Although several network architectures have been proposed to provide high entanglement rates at high fidelity, [12][13][14][15][16] there is still a long road ahead in designing efficient resource allocation algorithms and their performance analysis that can guide us to implement quantum networks at full-scale in future.…”

Section: Introductionmentioning

confidence: 99%

A throughput optimal scheduling policy for a quantum switch

Vasantam

¹

,

Towsley

²

2022

Quantum Computing, Communication, and Simulation II

View full text Add to dashboard Cite

We study a quantum switch that creates shared end-to-end entangled quantum states to multiple sets of users that are connected to it. Each user is connected to the switch via an optical link across which bipartite Bell-state entangled states are generated in each time-slot with certain probabilities, and the switch merges entanglements of links to create end-toend entanglements for users. One qubit of an entanglement of a link is stored at the switch and the other qubit of the entanglement is stored at the user corresponding to the link. Assuming that qubits of entanglements of links decipher after one time-slot, we characterize the capacity region, which is defined as the set of arrival rates of requests for end-to-end entanglements for which there exists a scheduling policy that stabilizes the switch. We propose a Max-Weight scheduling policy and show that it stabilizes the switch for all arrival rates that lie in the capacity region. We also provide numerical results to support our analysis.

show abstract

A quantum router architecture for high-fidelity entanglement flows in quantum networks

Cited by 34 publications

References 40 publications

Diamond Integrated Quantum Nanophotonics: Spins, Photons and Phonons

Diamond Integrated Quantum Nanophotonics: Spins, Photons and Phonons

Diamond Integrated Quantum Photonics: A Review

A throughput optimal scheduling policy for a quantum switch

Contact Info

Product

Resources

About