research
A Chip-Scale Switch Blocks Readout Noise
A tunable inductive bridge suppressed injected dephasing by more than 30 decibels.
Summary
A tunable inductive bridge suppressed injected dephasing by more than 30 decibels.
Placed in a fixed-frequency transmon readout chain, the switch transmitted only during measurement. It did not measurably change baseline coherence or fidelity, but suppressed dephasing from injected amplifier-like broadband noise by more than 30 dB. The result motivates an integrated isolator; it is not yet a complete replacement across quantum processors.
Why it matters
A tunable inductive bridge suppressed injected dephasing by more than 30 decibels.
Limits and context
- Placed in a fixed-frequency transmon readout chain, the switch transmitted only during measurement.
- It did not measurably change baseline coherence or fidelity, but suppressed dephasing from injected amplifier-like broadband noise by more than 30 dB.
- The result motivates an integrated isolator; it is not yet a complete replacement across quantum processors.
Key claims
A tunable inductive bridge suppressed injected dephasing by more than 30 decibels.
Qualification: Placed in a fixed-frequency transmon readout chain, the switch transmitted only during measurement.
Evidence: source-2026-10-21-017
Sources
- arXiv preprint 2610.27137, original v1arXiv · primary research
Corrections
No corrections have been recorded for this story.