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    "headline": "A Quantum Sensor Kept Its Edge Past Decoherence",
    "slug": "a-quantum-sensor-kept-its-edge-past-decoherence",
    "dek": "A trapped-ion demonstration maintained enhanced frequency precision across much longer total measurements.",
    "summary": "A trapped-ion demonstration maintained enhanced frequency precision across much longer total measurements.",
    "body_text": "Researchers embedded a Fock-state gain inside a Qdyne frequency-measurement protocol, taking short interrogations while allowing precision to accumulate across a long run. On a trapped calcium ion, quantum-enhanced precision persisted for total measurement times seven orders of magnitude beyond the dephasing limit and scaled as time to the power minus three-halves. With an n=3 state, the experiment reached 0.5 microhertz precision on an 86-megahertz carrier and a reported 7.1-decibel gain over n=0. The result is a laboratory sensing demonstration, not a deployed nanoscale instrument.",
    "why_it_matters": "A trapped-ion demonstration maintained enhanced frequency precision across much longer total measurements.",
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      "The result is a laboratory sensing demonstration, not a deployed nanoscale instrument."
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    "first_published_at": "2026-09-21T09:00:00.000-04:00",
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        "qualification": "The result is a laboratory sensing demonstration, not a deployed nanoscale instrument."
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    "tags": [
      "quantum sensing",
      "trapped ions",
      "frequency"
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  "sources": [
    {
      "source_id": "source-2026-09-21-015",
      "title": "arXiv preprint 2609.22046",
      "publisher": "arXiv",
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      "published_at": "2026-09-18T13:35:56.000-04:00",
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    "title": "A Quantum Sensor Kept Its Edge Past Decoherence",
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