期刊
SCIENCE ADVANCES
卷 3, 期 10, 页码 -出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.1701074
关键词
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资金
- Army Research Office
- Intelligence Advanced Research Projects Activity LogiQ program [3130638]
- Air Force Office of Scientific Research Multidisciplinary University Research Initiative program on Quantum Measurement and Verification [5710003628]
- NSF Physics Frontier Center at the Joint Quantum Institute [PHY0822671]
- Direct For Mathematical & Physical Scien
- Division Of Physics [1430094] Funding Source: National Science Foundation
Quantum computers will eventually reach a size at which quantum error correction becomes imperative. Quantum information can be protected from qubit imperfections and flawed control operations by encoding a single logical qubit in multiple physical qubits. This redundancy allows the extraction of error syndromes and the subsequent detection or correction of errors without destroying the logical state itself through direct measurement. We show the encoding and syndrome measurement of a fault-tolerantly prepared logical qubit via an error detection protocol on four physical qubits, represented by trapped atomic ions. This demonstrates the robustness of a logical qubit to imperfections in the very operations used to encode it. The advantage persists in the face of large added error rates and experimental calibration errors.
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