Demonstration of quantum error detection in a silicon quantum processor Article Swipe

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Chunhui Zhang , Chunhui Li , Zhen Tian , Yanfeng Jiang , Feng Xu , Shihang Zhang , Hao Wang , Yuning Zhang , Xue‐Song Bai , Baolong Zhao , Yifei Zhang , Shu Huan , Jiaze Liu , Kai Yi Wu , Chao Huang , Kui Shi , Meiling Duan , Xin Tao , Peihao Huang , Tianluo Pan , Song Liu , Guoxiu Wang , Guangchong Hu , Yu He , Dapeng Yu ·

YOU? · · 2025 · Open Access · · DOI: https://doi.org/10.48550/arxiv.2509.24766

Quantum error detection is essential in realizing large-scale universal quantum computation, especially for quantum error correction (QEC). However, key elements for FTQC have yet to be realized in silicon qubits. Here, we demonstrate quantum error detection on a donor-based silicon quantum processor comprising four-nuclear spin qubits and one electron spin as an auxiliary qubit. The entanglement capability of this system is validated through the establishment of two-qubit Bell state entanglement between the nuclear spins and the generation of a four-qubit Greenberger-Horne-Zeilinger (GHZ) state, achieving a GHZ state fidelity of 88.5(2.3)%. Furthermore, by executing a four-qubit error detection circuit with the stabilizers, we successfully detect arbitrary single-qubit errors. The encoded Bell state entanglement information is recovered by performing the Pauli-frame update (PFU) via postprocessing. Based on the detected errors, we identify strongly biased noise in our system. Our results mark a significant advance toward FTQC in silicon spin qubits.

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Type: preprint
Language: en
Landing Page: http://arxiv.org/abs/2509.24766
PDF: https://arxiv.org/pdf/2509.24766
OA Status: green
OpenAlex ID: https://openalex.org/W4415337333

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DOI: https://doi.org/10.48550/arxiv.2509.24766

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Title: Demonstration of quantum error detection in a silicon quantum processor

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Language: en

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Publication year: 2025

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Publication date: 2025-09-29

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Authors: Chunhui Zhang, Chunhui Li, Zhen Tian, Yanfeng Jiang, Feng Xu, Shihang Zhang, Hao Wang, Yuning Zhang, Xue‐Song Bai, Baolong Zhao, Yifei Zhang, Shu Huan, Jiaze Liu, Kai Yi Wu, Chao Huang, Kui Shi, Meiling Duan, Xin Tao, Peihao Huang, Tianluo Pan, Song Liu, Guoxiu Wang, Guangchong Hu, Yu He, Dapeng Yu

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Landing page: https://arxiv.org/abs/2509.24766

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Cited by: 0

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