Analytical blueprint for 99.999% fidelity X-gates on present superconducting hardware under strong driving
An arXiv preprint presents an analytical blueprint for implementing X-gates at 99.999% fidelity on existing superconducting qubits using strong driving. The approach derives pulse shapes analytically rather than via numerical optimization and is claimed to be compatible with current transmon hardware parameters.
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What this could mean
- 0–2 yearsSpeculative
If the analytical pulses are experimentally validated, superconducting processors could achieve five-nines single-qubit gate fidelity through software-level control changes alone, improving baseline error rates for near-term error-correction experiments.
The blueprint targets present hardware parameters, so implementation would require only revised pulse sequences on existing control electronics. Strong driving has been demonstrated in laboratory transmon experiments, but the jump from analytic construction to reproducible 99.999% fidelity across device variations still needs physical validation.
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