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    "story_id": "mp-2026-09-16-002",
    "source_story_id": "tmp-feature-dissipative-spin-chain-quantum-simulation",
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    "headline": "One Hundred Qubits Settled a Dissipative Chain",
    "slug": "one-hundred-qubits-settled-a-dissipative-chain",
    "dek": "A superconducting processor simulated 50 sites at depths up to 1,700 entangling gates and mapped 117 hardware points.",
    "summary": "A superconducting processor simulated 50 sites at depths up to 1,700 entangling gates and mapped 117 hardware points.",
    "body_text": "Open quantum systems can settle into steady states with no equilibrium counterpart, but their density matrices grow too quickly for controlled large-scale calculations. The team mapped a dissipative spin-1/2 Heisenberg chain onto 100 simultaneously active qubits on IBM's Kingston processor, using Stinespring dilation to represent 50 sites at entangling-gate depths up to 1,700. From 117 hardware measurements, they resolved ferromagnetic, antiferromagnetic, spin-density-wave and paramagnetic regions. Because the modeled dissipation continually erases some errors, hardware noise acts as a weaker competing bath. The result is a hardware study of one benchmark model, not a general claim of quantum advantage.",
    "why_it_matters": "A superconducting processor simulated 50 sites at depths up to 1,700 entangling gates and mapped 117 hardware points.",
    "limitations": [
      "The result is a hardware study of one benchmark model, not a general claim of quantum advantage."
    ],
    "importance": 10,
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    "first_published_at": "2026-09-16T09:00:00.000-04:00",
    "modified_at": "2026-09-16T09:00:00.000-04:00",
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        "text": "A superconducting processor simulated 50 sites at depths up to 1,700 entangling gates and mapped 117 hardware points.",
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        "qualification": "The result is a hardware study of one benchmark model, not a general claim of quantum advantage."
      }
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    "source_ids": [
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    "tags": [
      "quantum simulation",
      "open systems",
      "superconducting qubits"
    ],
    "image_url": "https://themachinepress.com/issues/2026-09-16/feature-dissipative-chain.png",
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  "sources": [
    {
      "source_id": "source-2026-09-16-002",
      "title": "arXiv preprint 2609.16108",
      "publisher": "arXiv",
      "url": "https://arxiv.org/abs/2609.16108",
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      "source_type": "primary_research",
      "is_primary_source": true,
      "published_at": "2026-09-14T20:00:00.000-04:00",
      "accessed_at": "2026-09-16T08:18:00.000-04:00",
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  "publisher": {
    "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": "One Hundred Qubits Settled a Dissipative Chain",
    "publisher": "The Machine Press",
    "published_at": "2026-09-16T09:00:00.000-04:00",
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