Loss-biased fault-tolerant quantum error correction
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arXiv
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| Auteurs principaux: | , , , |
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| Format: | Preprint |
| Publié: |
2026
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| _version_ | 1866913058026160128 |
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| author | Pecorari, Laura Brennen, Gavin K. Kondov, Stanimir S. Pupillo, Guido |
| author_facet | Pecorari, Laura Brennen, Gavin K. Kondov, Stanimir S. Pupillo, Guido |
| contents | We investigate the limits of quantum error correction (QEC) in neutral-atom processors approaching high-fidelity gates and fast cycle times. We show that shorter QEC cycles amplify platform-specific errors, notably Rydberg excitation hopping, and hinder decay of residual Rydberg population, leading to non-Markovian correlated errors that degrade logical performance. To address this, we introduce loss biasing, where spurious Rydberg excitations are rapidly converted into atom loss via mid-circuit ionization, transforming errors into erasure-like noise and suppressing their propagation. Loss biasing restores the fault-tolerant logical error scaling for intra-cycle Pauli errors; furthermore, we argue that when supported with loss-aware decoding, it can achieve the optimal scaling of erasures while enabling shorter QEC cycles with reduced hardware overhead. We outline an implementation using fast autoionization in alkaline-earth(-like) atoms, establishing loss biasing as a practical route toward fault-tolerant quantum computing with sub-millisecond QEC cycles. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_21876 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Loss-biased fault-tolerant quantum error correction Pecorari, Laura Brennen, Gavin K. Kondov, Stanimir S. Pupillo, Guido Quantum Physics We investigate the limits of quantum error correction (QEC) in neutral-atom processors approaching high-fidelity gates and fast cycle times. We show that shorter QEC cycles amplify platform-specific errors, notably Rydberg excitation hopping, and hinder decay of residual Rydberg population, leading to non-Markovian correlated errors that degrade logical performance. To address this, we introduce loss biasing, where spurious Rydberg excitations are rapidly converted into atom loss via mid-circuit ionization, transforming errors into erasure-like noise and suppressing their propagation. Loss biasing restores the fault-tolerant logical error scaling for intra-cycle Pauli errors; furthermore, we argue that when supported with loss-aware decoding, it can achieve the optimal scaling of erasures while enabling shorter QEC cycles with reduced hardware overhead. We outline an implementation using fast autoionization in alkaline-earth(-like) atoms, establishing loss biasing as a practical route toward fault-tolerant quantum computing with sub-millisecond QEC cycles. |
| title | Loss-biased fault-tolerant quantum error correction |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2604.21876 |