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Abstract

We show that universal quantum computation can be made fault-tolerant in a scenario where the error-correction is implemented without mid-circuit measurements. To this end, we introduce a measurement-free deformation protocol of the Bacon-Shor code to realize a logical \(\mathit{CCZ}\) gate, enabling a universal set of fault-tolerant operations. Independently, we demonstrate that certain stabilizer codes can be concatenated in a measurement-free way without having to rely on a universal logical gate set. This is achieved by means of the disposable Toffoli gadget, which realizes the feedback operation in a resource-efficient way. For the purpose of benchmarking the proposed protocols with circuit-level noise, we implement an efficient method to simulate non-Clifford circuits consisting of few Hadamard gates. In particular, our findings support that below-breakeven logical performance is achievable with a circuit-level error rate below \(10^{-3}\). Altogether, the deformation protocol and the Toffoli gadget provide a blueprint for a fully fault-tolerant architecture without any feed-forward operation, which is particularly suited for state-of-the-art neutral-atom platforms.

Details

1009240
Title
Universal quantum computation via scalable measurement-free error correction
Publication title
arXiv.org; Ithaca
Publication year
2024
Publication date
Dec 19, 2024
Section
Quantum Physics
Publisher
Cornell University Library, arXiv.org
Source
arXiv.org
Place of publication
Ithaca
Country of publication
United States
University/institution
Cornell University Library arXiv.org
e-ISSN
2331-8422
Source type
Working Paper
Language of publication
English
Document type
Working Paper
Publication history
 
 
Online publication date
2024-12-20
Milestone dates
2024-12-19 (Submission v1)
Publication history
 
 
   First posting date
20 Dec 2024
ProQuest document ID
3147567797
Document URL
https://www.proquest.com/working-papers/universal-quantum-computation-via-scalable/docview/3147567797/se-2?accountid=208611
Full text outside of ProQuest
Copyright
© 2024. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.
Last updated
2024-12-21
Database
2 databases
  • ProQuest One Academic
  • ProQuest One Academic