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- W4384807917 abstract "Because of their long coherence time and compatibility with industrial foundry processes, electron spin qubits are a promising platform for scalable quantum processors. A full-fledged quantum computer will need quantum error correction, which requires high-fidelity quantum gates. Analyzing and mitigating the gate errors are useful to improve the gate fidelity. Here, we demonstrate a simple yet reliable calibration procedure for a high-fidelity controlled-rotation gate in an exchange-always-on Silicon quantum processor allowing operation above the fault-tolerance threshold of quantum error correction. We find that the fidelity of our uncalibrated controlled-rotation gate is limited by coherent errors in the form of controlled-phases and present a method to measure and correct these phase errors. We then verify the improvement in our gate fidelities by randomized benchmark and gate-set tomography protocols. Finally, we use our phase correction protocol to implement a virtual, high-fidelity controlled-phase gate." @default.
- W4384807917 created "2023-07-20" @default.
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- W4384807917 date "2023-07-18" @default.
- W4384807917 modified "2023-09-25" @default.
- W4384807917 title "Hamiltonian Phase Error in Resonantly Driven CNOT Gate Above the Fault-Tolerant Threshold" @default.
- W4384807917 doi "https://doi.org/10.48550/arxiv.2307.09031" @default.
- W4384807917 hasPublicationYear "2023" @default.
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