Journal article
Quantum snakes on a plane: mobile, low-dimensional logical qubits on a 2D surface
- Abstract:
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Recent demonstrations indicate that silicon-spin quantum processing unit will be able to shuttle physical qubits rapidly and with high fidelity—a desirable feature for maximizing logical connectivity, supporting new codes, and routing around damage. However it may seem that shuttling at the logical level is unwise: static defects in the device may “scratch” a logical qubit as it passes, causing correlated errors to which the code is highly vulnerable. Here we explore an architecture where logical qubits are 1D strings (“snakes”) which can be moved freely over a planar latticework. Possible scratch events are inferred via monitor qubits and the complementary gap; if deemed a risk, remarkably the shuttle process can be undone in a way that negates any corruption. This leads to high levels of tolerance against shuttling-related imperfections and enables logical operations between snakes by a semitransversal method. We conclude that this approach is suitable for fault-tolerant computing in both near-term and long-term, mature-era silicon devices.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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- Files:
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(Preview, Version of record, pdf, 1.6MB, Terms of use)
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- Publisher copy:
- 10.1103/494s-jd8h
Authors
- Funder identifier:
- https://ror.org/001aqnf71
- Grant:
- MR/Y015843/1
- Funder identifier:
- https://ror.org/0439y7842
- Grant:
- EP/Y004655/1
- Publisher:
- American Physical Society
- Journal:
- PRX Quantum More from this journal
- Volume:
- 7
- Article number:
- 010339
- Publication date:
- 2026-02-25
- Acceptance date:
- 2025-12-17
- DOI:
- EISSN:
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2691-3399
- Language:
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English
- Pubs id:
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2365189
- UUID:
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uuid_efaa6cb4-1f3b-441b-9d6f-b23b22441094
- Local pid:
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pubs:2365189
- Source identifiers:
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W4417439749
- Deposit date:
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2026-01-30
- ARK identifier:
Terms of use
- Copyright holder:
- Siegel et al.
- Copyright date:
- 2026
- Rights statement:
- Copyright © 2026 The Author(s). Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
- Licence:
- CC Attribution (CC BY)
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