Optimizing Quantum Communication for Quantum Data Centers with Reconfigurable Networks Article Swipe

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Hezi Zhang , Yiran Xu , Haotian Hu , Keyi Yin , Hassan Shapourian , Jiapeng Zhao , Ramana Rao Kompella , Reza Nejabati , Yufei Ding ·

YOU? · · 2024 · Open Access · · DOI: https://doi.org/10.48550/arxiv.2412.04837

Distributed Quantum Computing (DQC) enables scalability by interconnecting multiple QPUs. Among various DQC implementations, quantum data centers (QDCs), which utilize reconfigurable optical switch networks to link QPUs across different racks, are becoming feasible in the near term. However, the latency of cross-rack communications and dynamic reconfigurations poses unique challenges to quantum communication, significantly increasing the overall latency and exacerbating qubit decoherence. In this paper, we introduce a new optimization space to parallelize cross-rack communications and avoid frequent reconfigurations, which incurs additional in-rack communications that can be further minimized. Based on this, we propose a flexible scheduler that improves communication efficiency while preventing deadlocks and congestion caused by the flexibility. Through a comprehensive evaluation, we show that our approach reduces the overall latency by a factor of 8.02, thereby mitigating qubit decoherence, with a small overhead.

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Quantum Computer science Quantum network Quantum information science Computer network Distributed computing Quantum computer Physics Quantum mechanics Quantum entanglement

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Type: preprint
Language: en
Landing Page: http://arxiv.org/abs/2412.04837
PDF: https://arxiv.org/pdf/2412.04837
OA Status: green
Related Works: 10
OpenAlex ID: https://openalex.org/W4405173641

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DOI: https://doi.org/10.48550/arxiv.2412.04837

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Title: Optimizing Quantum Communication for Quantum Data Centers with Reconfigurable Networks

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Type: preprint

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Language: en

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Publication year: 2024

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Publication date: 2024-12-06

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Authors: Hezi Zhang, Yiran Xu, Haotian Hu, Keyi Yin, Hassan Shapourian, Jiapeng Zhao, Ramana Rao Kompella, Reza Nejabati, Yufei Ding

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Landing page: https://arxiv.org/abs/2412.04837

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PDF URL: https://arxiv.org/pdf/2412.04837

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Concepts: Quantum, Computer science, Quantum network, Quantum information science, Computer network, Distributed computing, Quantum computer, Physics, Quantum mechanics, Quantum entanglement

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