Long-distance quantum communication using concatenated ring graph codes
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arXiv
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| Auteurs principaux: | , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866909579810439168 |
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| author | Pettersson, Love Sørensen, Anders S. |
| author_facet | Pettersson, Love Sørensen, Anders S. |
| contents | To realize long-distance quantum communication, it is crucial to design quantum repeater architectures that can deal with transmission losses and operational errors. Code concatenation of photonic graph codes is a promising way to achieve this; however, existing concatenated codes that can correct both transmission losses and operational errors are extremely hardware-demanding. We propose a one-way quantum repeater architecture based on concatenated ring graph codes and linear optical Bell-state measurements. We construct a scheme to generate the concatenated ring graph codes using quantum emitters, where the number of matter qubits scales linearly with concatenation depth. Furthermore, we devise a measurement strategy at each repeater station with a simple experimental setup where photons are measured in the order that they are created and show that entanglement swapping is fault-tolerant to both transmission losses and operational errors. This allows for long-distance quantum communication ($> 10^4$ km) at a kHZ rate even in the presence of single qubit error rates $ε> 10^{-3}$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_19822 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Long-distance quantum communication using concatenated ring graph codes Pettersson, Love Sørensen, Anders S. Quantum Physics To realize long-distance quantum communication, it is crucial to design quantum repeater architectures that can deal with transmission losses and operational errors. Code concatenation of photonic graph codes is a promising way to achieve this; however, existing concatenated codes that can correct both transmission losses and operational errors are extremely hardware-demanding. We propose a one-way quantum repeater architecture based on concatenated ring graph codes and linear optical Bell-state measurements. We construct a scheme to generate the concatenated ring graph codes using quantum emitters, where the number of matter qubits scales linearly with concatenation depth. Furthermore, we devise a measurement strategy at each repeater station with a simple experimental setup where photons are measured in the order that they are created and show that entanglement swapping is fault-tolerant to both transmission losses and operational errors. This allows for long-distance quantum communication ($> 10^4$ km) at a kHZ rate even in the presence of single qubit error rates $ε> 10^{-3}$. |
| title | Long-distance quantum communication using concatenated ring graph codes |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2503.19822 |