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    "story_id": "mp-2026-10-29-016",
    "source_story_id": "tmp-brief-field-quantum-key-distribution",
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    "headline": "A Quantum Dot Sends 14.2 Megabits of Secure Key Across Campus",
    "slug": "a-quantum-dot-sends-14-2-megabits-of-secure-key-across-campus",
    "dek": "Frequency-converted entangled photons sustained BBM92 key distribution over 1.59 kilometers of deployed fiber for 19 hours.",
    "summary": "Frequency-converted entangled photons sustained BBM92 key distribution over 1.59 kilometers of deployed fiber for 19 hours.",
    "body_text": "A one-gigahertz quantum-dot source fed polarization-entangled photons through telecom conversion and a field-deployed Stuttgart campus link. The experiment reports 206 secure bits per second and 14.2 megabits total after error correction and privacy amplification. It is a campus demonstration, not a commercial network claim.",
    "why_it_matters": "Frequency-converted entangled photons sustained BBM92 key distribution over 1.59 kilometers of deployed fiber for 19 hours.",
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        "qualification": "It is a campus demonstration, not a commercial network claim."
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    "tags": [
      "quantum networking",
      "cryptography",
      "quantum dots",
      "fiber optics"
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  "sources": [
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      "source_id": "source-2026-10-29-018",
      "title": "arXiv preprint 2610.37268, original v1",
      "publisher": "arXiv",
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    "title": "A Quantum Dot Sends 14.2 Megabits of Secure Key Across Campus",
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