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    "story_id": "mp-2026-09-05-009",
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    "headline": "The Vacuum's Photon Collision Moved Toward a Tabletop Test",
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    "dek": "Standing-wave laser interferometers could probe quantum-electrodynamic photon scattering without an external magnetic field.",
    "summary": "Standing-wave laser interferometers could probe quantum-electrodynamic photon scattering without an external magnetic field.",
    "body_text": "The proposal uses conventional laser sources inside standing-wave interferometers to look for photon-photon interactions in the matter vacuum. Sensitivity improves nonlinearly with circulating cavity power, which the authors argue brings the quantum-electrodynamic signal within reach of laboratory-scale experiments. They also outline adaptations for fields beyond the Standard Model. This is a theoretical experimental design, not a reported detection of vacuum nonlinearity or new particles.",
    "why_it_matters": "Standing-wave laser interferometers could probe quantum-electrodynamic photon scattering without an external magnetic field.",
    "limitations": [
      "Sensitivity improves nonlinearly with circulating cavity power, which the authors argue brings the quantum-electrodynamic signal within reach of laboratory-scale experiments.",
      "This is a theoretical experimental design, not a reported detection of vacuum nonlinearity or new particles."
    ],
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    "first_published_at": "2026-09-05T09:00:00.000-04:00",
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        "qualification": "Sensitivity improves nonlinearly with circulating cavity power, which the authors argue brings the quantum-electrodynamic signal within reach of laboratory-scale experiments."
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    "tags": [
      "quantum electrodynamics",
      "interferometry",
      "photon scattering"
    ],
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  "sources": [
    {
      "source_id": "source-2026-09-05-009",
      "title": "arXiv preprint 2609.03314",
      "publisher": "arXiv",
      "url": "https://arxiv.org/abs/2609.03314",
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      "published_at": "2026-09-02T23:07:27.000-04:00",
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    "title": "The Vacuum's Photon Collision Moved Toward a Tabletop Test",
    "publisher": "The Machine Press",
    "published_at": "2026-09-05T09:00:00.000-04:00",
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