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    "story_id": "mp-2026-10-18-008",
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    "headline": "Two Atomic Spins Cancel the Field and Keep the New Force",
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    "dek": "A proposed rubidium-condensate comagnetometer targets proton interactions below the range of existing direct laboratory probes.",
    "summary": "A proposed rubidium-condensate comagnetometer targets proton interactions below the range of existing direct laboratory probes.",
    "body_text": "A single-domain rubidium-87 spinor condensate can place two co-located atomic manifolds in opposite magnetic precession while a hypothetical monopole-dipole interaction drives them in the same direction. Summing their angles suppresses ordinary field noise; the demonstrated starting system achieved 44 decibels of rejection. With an insulating source mass placed 50 micrometers away and planned upgrades, the authors project one-week sensitivity more than three orders below existing laboratory limits at a 100-micrometer range, with a projection-noise limit more than five orders lower. These are sensitivity projections grounded in prior apparatus, not a detection of a new boson.",
    "why_it_matters": "A proposed rubidium-condensate comagnetometer targets proton interactions below the range of existing direct laboratory probes.",
    "limitations": [
      "With an insulating source mass placed 50 micrometers away and planned upgrades, the authors project one-week sensitivity more than three orders below existing laboratory limits at a 100-micrometer range, with a projection-noise limit more than five orders lower.",
      "These are sensitivity projections grounded in prior apparatus, not a detection of a new boson."
    ],
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    "first_published_at": "2026-10-18T09:00:00.000-04:00",
    "modified_at": "2026-10-18T09:00:00.000-04:00",
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        "text": "A proposed rubidium-condensate comagnetometer targets proton interactions below the range of existing direct laboratory probes.",
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        "qualification": "With an insulating source mass placed 50 micrometers away and planned upgrades, the authors project one-week sensitivity more than three orders below existing laboratory limits at a 100-micrometer range, with a projection-noise limit more than five orders lower."
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    "tags": [
      "atomic physics",
      "comagnetometry",
      "new forces"
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  "sources": [
    {
      "source_id": "source-2026-10-18-008",
      "title": "arXiv preprint 2610.22346, original v1",
      "publisher": "arXiv",
      "url": "https://arxiv.org/abs/2610.22346v1",
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      "source_type": "primary_research",
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      "published_at": "2026-10-15T13:56:58.000-04:00",
      "accessed_at": "2026-10-18T08:23:52.920-04:00",
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    "name": "The Machine Press",
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  "cite_this_report": {
    "title": "Two Atomic Spins Cancel the Field and Keep the New Force",
    "publisher": "The Machine Press",
    "published_at": "2026-10-18T09:00:00.000-04:00",
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