research
The Qubit Crossed Five Nines After the Reservoir Left
Removing nearby reservoirs and shaping microwave pulses produced a reported 99.99920 percent single-qubit gate fidelity.
Summary
Removing nearby reservoirs and shaping microwave pulses produced a reported 99.99920 percent single-qubit gate fidelity.
The team found that proximal reservoirs shortened driven-spin coherence and that off-resonant excitation of neighboring qubits could distort fidelity benchmarking. After changing device conditions and tailoring pulse spectra, it reports a pi-over-two gate fidelity of 99.99920(2) percent in silicon spin qubits. Remaining error was attributed mainly to incoherent noise. The figure is an experimental result for the reported devices and benchmarking protocol, not a system-level fault-tolerance claim.
Why it matters
Removing nearby reservoirs and shaping microwave pulses produced a reported 99.99920 percent single-qubit gate fidelity.
Limits and context
- The figure is an experimental result for the reported devices and benchmarking protocol, not a system-level fault-tolerance claim.
Key claims
Removing nearby reservoirs and shaping microwave pulses produced a reported 99.99920 percent single-qubit gate fidelity.
Qualification: The figure is an experimental result for the reported devices and benchmarking protocol, not a system-level fault-tolerance claim.
Evidence: source-2026-08-12-005
Sources
- arXiv preprint 2608.11072arXiv · primary research
Corrections
No corrections have been recorded for this story.