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    "story_id": "mp-2026-11-08-026",
    "source_story_id": "tmp-story-zefoz-recalibration",
    "edition_id": "mp-2026-11-08-morning-0121",
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    "section": "chips-infrastructure",
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    "headline": "Quantum-Memory Sweet Spots Can Be Found Again",
    "slug": "quantum-memory-sweet-spots-can-be-found-again",
    "dek": "A full-Hessian search balances modeled dephasing and microwave control, then numerically relocates operating points after parameter drift.",
    "summary": "A full-Hessian search balances modeled dephasing and microwave control, then numerically relocates operating points after parameter drift.",
    "body_text": "For erbium-167 in yttrium orthosilicate, the authors search zero-first-order-Zeeman operating points with an anisotropic field-covariance model from the host lattice. Four Pareto-optimal transition pairs trade modeled magnetic pure-dephasing time against microwave control authority. In an assumption-based Hamiltonian-uncertainty analysis, every sampled perturbation shifted the nominal field coordinate, but numerical vector-field recalibration recovered the Pareto points. The very long modeled lifetimes remain conditional on the adopted bath and correlation assumptions and on operation near 10 millikelvin.",
    "why_it_matters": "A full-Hessian search balances modeled dephasing and microwave control, then numerically relocates operating points after parameter drift.",
    "limitations": [
      "The very long modeled lifetimes remain conditional on the adopted bath and correlation assumptions and on operation near 10 millikelvin."
    ],
    "importance": 8,
    "canonical_url": "https://themachinepress.com/story/mp-2026-11-08-026/quantum-memory-sweet-spots-can-be-found-again",
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    "first_published_at": "2026-11-08T09:00:00.000-05:00",
    "modified_at": "2026-11-08T09:00:00.000-05:00",
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        "text": "A full-Hessian search balances modeled dephasing and microwave control, then numerically relocates operating points after parameter drift.",
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        "qualification": "The very long modeled lifetimes remain conditional on the adopted bath and correlation assumptions and on operation near 10 millikelvin."
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    "source_ids": [
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    "tags": [
      "quantum memory",
      "erbium",
      "calibration"
    ],
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  "sources": [
    {
      "source_id": "source-2026-11-08-015",
      "title": "arXiv preprint 2611.08396, original v1",
      "publisher": "arXiv",
      "url": "https://arxiv.org/abs/2611.08396v1",
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      "published_at": "2026-11-05T13:08:14.000-05:00",
      "accessed_at": "2026-11-08T08:27:17.257-05:00",
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    "name": "The Machine Press",
    "url": "https://themachinepress.com",
    "description": "A daily newspaper for the age of artificial intelligence."
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  "cite_this_report": {
    "title": "Quantum-Memory Sweet Spots Can Be Found Again",
    "publisher": "The Machine Press",
    "published_at": "2026-11-08T09:00:00.000-05:00",
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