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One Control Field Cut Qubit Leakage by Three Orders
An analytic pulse correction suppressed simulated fast-iSWAP leakage without a second control channel.
Summary
An analytic pulse correction suppressed simulated fast-iSWAP leakage without a second control channel.
Leakage-suppression recipes such as DRAG commonly assume two orthogonal controls, but baseband flux architectures may provide only one real-valued field. A Magnus-expansion construction shapes that single field for a tunable-coupler two-transmon gate. With realistic simulated parameters, the correction reduced non-adiabatic leakage from the coupler ramp by as much as three orders of magnitude. The result is a general analytic control proposal supported by device simulation, not an experimental gate demonstration.
Why it matters
An analytic pulse correction suppressed simulated fast-iSWAP leakage without a second control channel.
Limits and context
- Leakage-suppression recipes such as DRAG commonly assume two orthogonal controls, but baseband flux architectures may provide only one real-valued field.
- The result is a general analytic control proposal supported by device simulation, not an experimental gate demonstration.
Key claims
An analytic pulse correction suppressed simulated fast-iSWAP leakage without a second control channel.
Qualification: Leakage-suppression recipes such as DRAG commonly assume two orthogonal controls, but baseband flux architectures may provide only one real-valued field.
Evidence: source-2026-09-19-013
Sources
- arXiv preprint 2609.20766arXiv · primary research
Corrections
No corrections have been recorded for this story.