Development of Quantum Interconnects (QuICs) for Next-Generation Information Technologies

Awschalom, D. D.; Berggren, Karl K.; Bernien, Hannes; Bhave, Sunil A.; Carr, Lincoln D.; Davids, Paul; Economou, Sophia E.; Englund, Dirk; Faraon, Andrei; Fejer, M. M.; Guha, Saikat; Gustafsson, Martin V.; Hu, Evelyn L.; Jiang, Liang; Kim, Jungsang; Korzh, Boris; Kumar, Prem; Kwiat, Paul G.; Lončar, Marko; Lukin, Mikhail D.; Miller, David A. B.; Monroe, Christopher; Nam, Sae Woo; Narang, Prineha; Orcutt, Jason S.; Raymer, Michael G.; Safavi-Naeini, Amir H.; Spiropulu, M.; Srinivasan, Kartik; Sun, Shuo; Vučković, Jelena; Waks, Edo; Walsworth, Ronald L.; Weiner, Andrew M.; Zhang, Zheshen

doi:10.1103/prxquantum.2.017002

Cited by 273 publications

(127 citation statements)

References 154 publications

(149 reference statements)

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“…The presented quantum memory with high efficiency and low excess noise makes the possibility of preserving optical quantum states such as the squeezed light. The memory system with high efficiency and low excess noise has been able to be directly applied in executing quantum logic gates [6,7] between quantum-network modules (nodes) connected in a small range and realizing sub-QNL atomic magnetometry [9].…”

Section: Resultsmentioning

confidence: 99%

“…For scaling up the computational power, modular quantum processors provide a solution by integrating smaller quantum modules to a larger computing cluster. Modular quantum platforms are to keep smaller individual processing units, then connect them to one another via quantum entanglement among multiple quantum-network modules, and thereby implement more 2 complex quantum operations, such as distributed quantum logic gates [6,7]. Enhancing the ability to entangle different modules (nodes) is significant for achieving such a modular approach, and its realizing depends on the memory fidelity of storing the multipartite entangled optical modes among quantum modules (nodes).…”

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confidence: 99%

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High-performance cavity-enhanced quantum memory with warm atomic cell

Liu

Yan

et al. 2021

Preprint

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High-performance quantum memory for quantized states of light is a prerequisite building block of quantum information technology. Despite great progresses of optical quantum memories based on interactions of light and atoms, physical features of these memories still can not satisfy the requirement for applications in practical quantum information systems, since all of them suffer from trade off between memory efficiency and excess noise. Here, we report a high-performance cavity-enhanced electromagnetically-induced-transparency memory with warm atomic cell in which a scheme of optimizing the spatial and temporal modes based on the time-reversal approach is applied. A quantum memory with the efficiency up to 78 + 1% and the noise level close to quantum noise limit has been experimentally achieved. The realized quantum memory platform has been capable of preserving quantized optical states, and thus is ready to be applied in quantum information systems, such as distributed quantum logic gates and quantum-enhanced atomic magnetometry.

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

High-performance cavity-enhanced quantum memory with warm atomic cell

Liu

Yan

et al. 2021

Preprint

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“…The results in this section have been obtained with the Network Simulator for Quantum Information using Discrete events (NetSquid) 2 , written in Python and free to download and use. The tool has been used, for instance, to run the experiments published in [12].…”

Section: A Methodology and Assumptionsmentioning

confidence: 99%

“…The Quantum Internet will enable distributed quantum computation [8] and many other applications [36]. A roadmap for its realization is neatly summarized in [43] while a break-down of the technologies involved and their recent status is reported in [2]. The most important building block of quantum networks is the quantum repeater (or repeater for short) 1 , which allows the transfer of quantum states through entanglement swap [5].…”

Section: Introductionmentioning

confidence: 99%

Request Scheduling in Quantum Networks

Cicconetti

Conti

Passarella

2021

IEEE Trans. Quantum Eng.

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Quantum networking is emerging as a new research area to explore the opportunities of inter-connecting quantum systems through end-to-end entanglement of qubits at geographical distance via quantum repeaters. A promising architecture has been proposed in the literature that decouples entanglement between adjacent quantum nodes / repeaters from establishing end-to-end paths by adopting a time slotted approach. Within this model, we destructure further end-to-end path establishment into two sub-problems: path selection and scheduling. The former is set to determine the best repeaters to connect two end nodes, provided that all their local entanglements have succeeded. On the other hand, scheduling is concerned with deciding which pairs of end nodes are served in the current time slot, while the others remain queued for later time slots. Unlike path selection, scheduling has not been investigated so far in the literature, particularly in presence of quantum noise, which makes both problems even more challenging. We propose to address it via a general framework of heuristic algorithms, for which we propose three illustrative instances with the objective of keeping the application delay small while achieving a good system utilization, in terms of high entanglement rate and fidelity of remotely entangled qubits. The system proposed is evaluated extensively via event-driven quantum network simulations, with noisy repeaters, in different node topologies under a Poisson arrival of requests from quantum applications. The results show the existence of a fundamental trade-off between system-and application-level metrics, such as fairness vs. entanglement and fidelity, which lays the foundations for further studies in this thriving research area.

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“…This includes protocols and analysis for using different platforms, multimode memories [9], minimizing physical resources [10], new experiments [11], [12], encoding [13], [14], error correction [15]- [17]; and network level analysis [18]- [22]. As interest develops in building practical links [23], [24], there is a need to translate system level performance into targets at the device and materials level for engineering impact. This is an approach that has been pioneered by the silicon microelectronics community (see for example refs.…”

Section: Introductionmentioning

confidence: 99%

Key Device and Materials Specifications for a Repeater Enabled Quantum Internet

Singh

Jiang

Awschalom

et al. 2021

IEEE Trans. Quantum Eng.

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Entangled photons can be used to create a truly secure communication link between two parties. However, the distance over which this can be achieved is limited by the transmission losses associated with optical fibers. One potential solution is using quantum repeaters (QRs) where initial entanglement is created over short distances and then extended via entanglement swapping. The system level performance metrics (data rate, fidelity of entanglement etc.) impose demands upon the hardware components (of a QR) which can be used to guide applied materials and device design towards these objectives. This has become increasingly important with an expanding list of candidates for quantum technologies, as the physical realization of each qubit or detector technology brings its own set of advantages and disadvantages. In this paper, we present a framework that uses a modular model of a QR and highlights the trade-offs that exist between technological component modules. Using reported values, we take a near-term perspective and show the achievable range of rates as a function of distance and the corresponding requirements on matter qubit properties.

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Development of Quantum Interconnects (QuICs) for Next-Generation Information Technologies

Abstract: were charged to identify the scientific and community needs, opportunities, and significant challenges for quantum interconnects over the next 2-5 years.

Cited by 273 publications

References 154 publications

High-performance cavity-enhanced quantum memory with warm atomic cell

High-performance cavity-enhanced quantum memory with warm atomic cell

Request Scheduling in Quantum Networks

Key Device and Materials Specifications for a Repeater Enabled Quantum Internet

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