Fault-tolerant interfaces for modular quantum computing on diverse qubit platforms
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866909008855564288 |
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| author | Marqversen, Frederik K. Baranes, Gefen Sirotin, Maxim Borregaard, Johannes |
| author_facet | Marqversen, Frederik K. Baranes, Gefen Sirotin, Maxim Borregaard, Johannes |
| contents | Modular architectures offer a scalable path toward fault-tolerant quantum computing by interconnecting smaller quantum processing units (QPUs) provided that high-rate, fault-tolerant interfaces can be realized across modules. We present a comprehensive analysis and comparison of known and new methods for establishing such interfaces, including lattice surgery, transversal gates, and novel grow-and-distil protocols based on code growing and logical distillation. Using the surface code, we identify optimal interface strategies across a wide range of hardware parameters, such as gate fidelities, entangling rates, and memory resources, and estimate the requirements to achieve logical error rates of $10^{-6}$ and $10^{-12}$. Our results establish when the interface become a bottleneck in the computation and provide guidance for experimental implementations with superconducting, atomic, and solid-state hardware. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_05221 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Fault-tolerant interfaces for modular quantum computing on diverse qubit platforms Marqversen, Frederik K. Baranes, Gefen Sirotin, Maxim Borregaard, Johannes Quantum Physics Modular architectures offer a scalable path toward fault-tolerant quantum computing by interconnecting smaller quantum processing units (QPUs) provided that high-rate, fault-tolerant interfaces can be realized across modules. We present a comprehensive analysis and comparison of known and new methods for establishing such interfaces, including lattice surgery, transversal gates, and novel grow-and-distil protocols based on code growing and logical distillation. Using the surface code, we identify optimal interface strategies across a wide range of hardware parameters, such as gate fidelities, entangling rates, and memory resources, and estimate the requirements to achieve logical error rates of $10^{-6}$ and $10^{-12}$. Our results establish when the interface become a bottleneck in the computation and provide guidance for experimental implementations with superconducting, atomic, and solid-state hardware. |
| title | Fault-tolerant interfaces for modular quantum computing on diverse qubit platforms |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2510.05221 |