Fidelity-Aware Multipath Routing for Multipartite State Distribution in Quantum Networks
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866913978465124352 |
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| author | Sutcliffe, Evan Beghelli, Alejandra |
| author_facet | Sutcliffe, Evan Beghelli, Alejandra |
| contents | We consider the problem of distributing entangled multipartite states across a quantum network with improved distribution rate and fidelity. For this, we propose fidelity-aware multi-path routing protocols, assess their performance in terms of the rate and fidelity of the distributed Greenberger-Horne-Zeilinger (GHZ) states, and compare such performance against that of single-path routing. Simulation results show that the proposed multi-path routing protocols select routes that require more Bell states compared to single-path routing, but also require fewer rounds of Bell state generation. We also optimised the trade-off between distribution rate and fidelity by selecting an appropriate cutoff to the quantum memory storage time. Using such a cutoff technique, the proposed multi-path protocols can achieve up to an 8.3 times higher distribution rate and up to a 28% improvement in GHZ state fidelity compared to single-path routing. These results show that multi-path routing both improves the distribution rates and enhances fidelity for multipartite state distribution. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2503_03831 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Fidelity-Aware Multipath Routing for Multipartite State Distribution in Quantum Networks Sutcliffe, Evan Beghelli, Alejandra Quantum Physics We consider the problem of distributing entangled multipartite states across a quantum network with improved distribution rate and fidelity. For this, we propose fidelity-aware multi-path routing protocols, assess their performance in terms of the rate and fidelity of the distributed Greenberger-Horne-Zeilinger (GHZ) states, and compare such performance against that of single-path routing. Simulation results show that the proposed multi-path routing protocols select routes that require more Bell states compared to single-path routing, but also require fewer rounds of Bell state generation. We also optimised the trade-off between distribution rate and fidelity by selecting an appropriate cutoff to the quantum memory storage time. Using such a cutoff technique, the proposed multi-path protocols can achieve up to an 8.3 times higher distribution rate and up to a 28% improvement in GHZ state fidelity compared to single-path routing. These results show that multi-path routing both improves the distribution rates and enhances fidelity for multipartite state distribution. |
| title | Fidelity-Aware Multipath Routing for Multipartite State Distribution in Quantum Networks |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2503.03831 |