Rare-Event Quantum Sensing using Logical Qubits
Fuente:
arXiv
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| Auteurs principaux: | , , , , |
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| Format: | Preprint |
| Publié: |
2026
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| _version_ | 1866917189255168000 |
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| author | Ott, Robert Zache, Torsten V. Choi, Soonwon Kaufman, Adam M. Pichler, Hannes |
| author_facet | Ott, Robert Zache, Torsten V. Choi, Soonwon Kaufman, Adam M. Pichler, Hannes |
| contents | We present a novel protocol to detect rare signals in a noisy environment using quantum error correction (QEC). The key feature of our protocol is the discrimination between signal and noise through distinct higher-order correlations, realized by the non-linear processing that occurs during syndrome extraction in QEC. In this scheme, QEC has two effects: First, it sacrifices part of the signal $ε$ by recording a reduced, stochastic, logical phase $ϕ_L = \mathcal{O}(ε^3)$. Second, it corrects the physical noise and extends the (logical) coherence time for signal acquisition. For rare signals occurring at random times in the presence of local Markovian noise, we explicitly demonstrate an improved sensitivity of our approach over more conventional sensing strategies. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_04313 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Rare-Event Quantum Sensing using Logical Qubits Ott, Robert Zache, Torsten V. Choi, Soonwon Kaufman, Adam M. Pichler, Hannes Quantum Physics We present a novel protocol to detect rare signals in a noisy environment using quantum error correction (QEC). The key feature of our protocol is the discrimination between signal and noise through distinct higher-order correlations, realized by the non-linear processing that occurs during syndrome extraction in QEC. In this scheme, QEC has two effects: First, it sacrifices part of the signal $ε$ by recording a reduced, stochastic, logical phase $ϕ_L = \mathcal{O}(ε^3)$. Second, it corrects the physical noise and extends the (logical) coherence time for signal acquisition. For rare signals occurring at random times in the presence of local Markovian noise, we explicitly demonstrate an improved sensitivity of our approach over more conventional sensing strategies. |
| title | Rare-Event Quantum Sensing using Logical Qubits |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2601.04313 |