research
Quantum Gate Speed Hit a Square-Root Energy Wall
Under linear coupling, fixed-fidelity transition rates can grow no faster than the square root of pulse energy.
Summary
Under linear coupling, fixed-fidelity transition rates can grow no faster than the square root of pulse energy.
A general bound covers squeezed and non-Gaussian pulses, drive-system entanglement and back-action. It says state engineering alone cannot turn linear coupling into the linear energy scaling allowed by broader speed limits; changing the interaction class is necessary.
Why it matters
Under linear coupling, fixed-fidelity transition rates can grow no faster than the square root of pulse energy.
Limits and context
- It says state engineering alone cannot turn linear coupling into the linear energy scaling allowed by broader speed limits; changing the interaction class is necessary.
Key claims
Under linear coupling, fixed-fidelity transition rates can grow no faster than the square root of pulse energy.
Qualification: It says state engineering alone cannot turn linear coupling into the linear energy scaling allowed by broader speed limits; changing the interaction class is necessary.
Evidence: source-2026-09-20-017
Sources
- arXiv preprint 2609.19280arXiv · primary research
Corrections
No corrections have been recorded for this story.