Optimizing Quantum Communication for Quantum Data Centers with Reconfigurable Networks
Fuente:
arXiv
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| Auteurs principaux: | , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866917859485024256 |
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| author | Zhang, Hezi Xu, Yiran Hu, Haotian Yin, Keyi Shapourian, Hassan Zhao, Jiapeng Kompella, Ramana Rao Nejabati, Reza Ding, Yufei |
| author_facet | Zhang, Hezi Xu, Yiran Hu, Haotian Yin, Keyi Shapourian, Hassan Zhao, Jiapeng Kompella, Ramana Rao Nejabati, Reza Ding, Yufei |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_04837 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Optimizing Quantum Communication for Quantum Data Centers with Reconfigurable Networks Zhang, Hezi Xu, Yiran Hu, Haotian Yin, Keyi Shapourian, Hassan Zhao, Jiapeng Kompella, Ramana Rao Nejabati, Reza Ding, Yufei Quantum Physics 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. |
| title | Optimizing Quantum Communication for Quantum Data Centers with Reconfigurable Networks |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2412.04837 |