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Quantum error detection in a silicon quantum processor
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DOI：10.1038/s41928-025-01557-1.png)
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Abstract
En 中文
Quantum error detection is essential for large-scale universal quantum computation, particularly for quantum error correction. However, the key elements of fault-tolerant quantum computing with silicon qubits, including error detection with stabilizers, remain challenging. Here we report quantum error detection in a donor-based silicon quantum processor comprising four nuclear spin qubits and one electron spin 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 state with a state fidelity of 88.5 ± 2.3%. We use a four-qubit error detection circuit with stabilizers to detect arbitrary single-qubit errors. We recover the encoded Bell-state entanglement information by performing the Pauli frame update via postprocessing; on the basis of the detected errors, we identify strongly biased noise in our system. A four-qubit quantum error detection circuit with stabilizers can be implemented with spin qubits in a donor-based silicon quantum processor.
Keywords:
Quantum error detection
Silicon quantum processor
Stabilizer codes
Spin qubits
Fault-tolerant quantum computing
Journal
IF:
40.9
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1.7K
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2.1W