research
A Diamond Spin Ensemble Revealed Its Own Projection Noise
Nuclear-memory readout improved fidelity nearly tenfold and resolved interaction-driven anisotropy.
Summary
Nuclear-memory readout improved fidelity nearly tenfold and resolved interaction-driven anisotropy.
A two-dimensional nitrogen-vacancy ensemble in diamond was read repeatedly through intrinsic nitrogen-15 nuclear memory at about 0.3 tesla. The method improved readout fidelity by nearly an order of magnitude, enough to resolve coherent-state quantum projection noise and watch dipolar interactions shear it into an anisotropic profile. The experiment opens a route toward directly measuring spin squeezing and entanglement-enhanced sensing, but does not report those later sensing gains yet.
Why it matters
Nuclear-memory readout improved fidelity nearly tenfold and resolved interaction-driven anisotropy.
Limits and context
- The experiment opens a route toward directly measuring spin squeezing and entanglement-enhanced sensing, but does not report those later sensing gains yet.
Key claims
Nuclear-memory readout improved fidelity nearly tenfold and resolved interaction-driven anisotropy.
Qualification: The experiment opens a route toward directly measuring spin squeezing and entanglement-enhanced sensing, but does not report those later sensing gains yet.
Evidence: source-2026-09-16-018
Sources
- arXiv preprint 2609.16106arXiv · primary research
Corrections
No corrections have been recorded for this story.