Cyclic control via parameter-space expansion restores controllability in fast CZ gates despite short-timescale distortions, cutting average coherent error from 0.27% to 0.12% in superconducting qubit experiments without extending gate duration.
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A geometric logical T gate in superconducting qubits suppresses Rabi frequency, detuning, and crosstalk errors to fourth order while inherently handling collective dephasing via DFS encoding and optimized pulses.
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Overcoming the Speed-Fidelity Trade-off in Fast CZ Gates via Cyclic Control
Cyclic control via parameter-space expansion restores controllability in fast CZ gates despite short-timescale distortions, cutting average coherent error from 0.27% to 0.12% in superconducting qubit experiments without extending gate duration.
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Suppression of Universal Errors in DFS-Encoded Superconducting Geometric Logical \emph{T} Gate
A geometric logical T gate in superconducting qubits suppresses Rabi frequency, detuning, and crosstalk errors to fourth order while inherently handling collective dephasing via DFS encoding and optimized pulses.