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A Logical Bell Measurement Cleared the 50% Optical Limit
A two-qubit repetition code reached a mean 70.8% success probability with linear optics.
Published Updated Story ID: mp-2026-09-11-015
Summary
A two-qubit repetition code reached a mean 70.8% success probability with linear optics.
The experiment used error-corrected logical qubits to achieve 70.8 ± 0.4% mean Bell-state measurement success, above the 50% ceiling for standard linear-optical measurements. The authors argue the code adds no extra overhead where error correction is already required.
Why it matters
A two-qubit repetition code reached a mean 70.8% success probability with linear optics.
Limits and context
No additional limitation was separately recorded.
Key claims
A two-qubit repetition code reached a mean 70.8% success probability with linear optics.
Evidence: source-2026-09-11-017
Sources
- arXiv preprint 2609.10698arXiv · primary research
Corrections
No corrections have been recorded for this story.