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    "story_id": "mp-2026-10-27-027",
    "source_story_id": "tmp-story-rydberg-coherent-receiver",
    "edition_id": "mp-2026-10-27-morning-0109",
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    "headline": "Eight Meters of Light Keep a Microwave Receiver in Phase",
    "slug": "eight-meters-of-light-keep-a-microwave-receiver-in-phase",
    "dek": "A remote cesium Rydberg sensor recovered its local oscillator over an optical link and returned coherent microwave measurements without a remote clock.",
    "summary": "A remote cesium Rydberg sensor recovered its local oscillator over an optical link and returned coherent microwave measurements without a remote clock.",
    "body_text": "Distributed microwave receivers usually need remote oscillators, local intermediate-frequency acquisition and clock synchronization. This experiment intensity-modulated a 3.989-gigahertz local oscillator onto an 852-nanometer optical probe, sent it over an eight-meter free-space link and recovered it at a cesium Rydberg-atom sensor. A test signal offset by five kilohertz produced an optically detected intermediate-frequency response that returned to the reference station. Over ten minutes, remote-versus-local phase had a standard deviation of 0.476 degrees and reached a minimum overlapping Allan deviation of 0.048 degrees near 200 seconds. After interrupting the optical link, phase recovered without recalibration, with a reported pre/post difference of 0.01 degrees. The laboratory demonstration supports future coherent arrays; it is not yet a fielded radar network.",
    "why_it_matters": "A remote cesium Rydberg sensor recovered its local oscillator over an optical link and returned coherent microwave measurements without a remote clock.",
    "limitations": [
      "The laboratory demonstration supports future coherent arrays; it is not yet a fielded radar network."
    ],
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    "first_published_at": "2026-10-27T09:00:00.000-04:00",
    "modified_at": "2026-10-27T09:00:00.000-04:00",
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        "text": "A remote cesium Rydberg sensor recovered its local oscillator over an optical link and returned coherent microwave measurements without a remote clock.",
        "source_ids": [
          "source-2026-10-27-016"
        ],
        "qualification": "The laboratory demonstration supports future coherent arrays; it is not yet a fielded radar network."
      }
    ],
    "source_ids": [
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    "tags": [
      "Rydberg atoms",
      "microwaves",
      "sensing",
      "interferometry"
    ],
    "image_url": null,
    "corrections": []
  },
  "sources": [
    {
      "source_id": "source-2026-10-27-016",
      "title": "arXiv preprint 2610.33552, original v1",
      "publisher": "arXiv",
      "url": "https://arxiv.org/abs/2610.33552v1",
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      "source_type": "primary_research",
      "is_primary_source": true,
      "published_at": "2026-10-25T20:00:00.000-04:00",
      "accessed_at": "2026-10-27T08:18:12.114-04:00",
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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": "Eight Meters of Light Keep a Microwave Receiver in Phase",
    "publisher": "The Machine Press",
    "published_at": "2026-10-27T09:00:00.000-04:00",
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