research
Four On-Chip Sensors Beat the Shot-Noise Limit
An integrated circuit measured four distributed phases with 0.199 dB of entanglement-enhanced precision.
Summary
An integrated circuit measured four distributed phases with 0.199 dB of entanglement-enhanced precision.
A photonic chip generated a four-mode entangled state, verified it and sensed linear combinations of four phase shifts with four integrated homodyne detectors. The entangled configuration reached 0.199(16) decibels below the shot-noise limit, compared with 0.041(18) decibels for separable states. The result moves one distributed-sensing architecture from bulk optics onto an integrated platform.
Why it matters
An integrated circuit measured four distributed phases with 0.199 dB of entanglement-enhanced precision.
Limits and context
No additional limitation was separately recorded.
Key claims
An integrated circuit measured four distributed phases with 0.199 dB of entanglement-enhanced precision.
Evidence: source-2026-09-17-018
Sources
- arXiv preprint 2609.19092arXiv · primary research
Corrections
No corrections have been recorded for this story.