Berlin 2024 – scientific programme
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QI: Fachverband Quanteninformation
QI 7: Quantum Error Correction
QI 7.11: Talk
Monday, March 18, 2024, 17:45–18:00, HFT-TA 441
Distributed quantum codes as the sensor for chip-level catastrophic errors — •Song Zhang1,2, Xiuhao Deng1,3, Guixu Xie1,2, and Jinghan Lu1,2 — 1International Quantum Academy (SIQA), Shenzhen, P. R. China — 2Shenzhen Institute for Quantum Science and Engineering (SIQSE), Southern University of Science and Technology, Shenzhen, P. R. China — 3Shenzhen Institute for Quantum Science and Engineering (SIQSE), and Department of Physics, Southern University of Science and Technology, Shenzhen, P. R. China
Superconducting qubits are a key platform for quantum computing, but recent studies have revealed a critical challenge: ionizing radiation like cosmic rays can trigger correlated errors across all qubits on a chip, leading to catastrophic errors. This issue presents a significant obstacle for fault-tolerant quantum computing, as it defies the conventional assumption of short-range or uncorrelated errors in error correction strategies. To overcome this issue, we propose novel cross-chip schemes that function as a distributed quantum sensor, specifically designed to detect these chip-level correlated errors. Our sensor is particularly practical for real-world applications due to its reliance on quantum non-demolition measurements, which reduces unnecessary resets, and its ability to detect and differentiate errors with various types and correlation ranges. This approach is a crucial step towards enabling large-scale, fault-tolerant quantum architectures by tackling the problem of chip-level catastrophic errors.
Keywords: quantum metrology; cosmic ray event; correlated errors; distributed quantum sensing; distributed error detection code