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Quantum control for high-fidelity multi-qubit gates

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arxiv 1805.03569 v2 pith:ZY2ZQNNB submitted 2018-05-09 quant-ph

Raymond J. Spiteri , Marina Schmidt , Joydip Ghosh , Ehsan Zahedinejad , Barry C. Sanders This is my paper · ORCID
classification quant-ph
keywords controlquantumhigh-fidelitygatesmulti-qubitproblemsingle-shotaddress
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

Quantum control for error correction is critical for the practical use of quantum computers. We address quantum optimal control for single-shot multi-qubit gates by framing as a feasibility problem for the Hamiltonian model and then solving with standard global-optimization software. Our approach yields faster high-fidelity ($>$99.99\%) single-shot three-qubit-gate control than obtained previously, and our method has enabled us to solve the quantum-control problem for a fast high-fidelity four-qubit gate.

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  1. Quantum error correction with global control

    quant-ph 2026-08 conditional novelty 6.0 of 10

    A globally controlled qubit ring with no transport auxiliary qubits can run a cyclic stabilizer code, with simulated QEC thresholds around 0.1-0.5%.

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