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    "story_id": "mp-2026-09-18-012",
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    "headline": "The Germanium Spin Qubit Cut Drive Power by 25 Decibels",
    "slug": "the-germanium-spin-qubit-cut-drive-power-by-25-decibels",
    "dek": "A flopping-mode design reached 99.76% single-qubit gate fidelity at a five-millitesla field.",
    "summary": "A flopping-mode design reached 99.76% single-qubit gate fidelity at a five-millitesla field.",
    "body_text": "The experiment delocalized one hole spin across a double quantum dot, combining a charge-noise sweet spot with efficient electric-dipole spin resonance. At an almost in-plane five-millitesla magnetic field, the device used -52 dBm of drive power rather than the roughly -27 dBm cited for conventional planar germanium operation. It achieved up to 99.76% single-qubit gate fidelity with an 88-nanosecond pi rotation, 1.4 microseconds of inhomogeneous coherence, and 130 microseconds under a 32-pulse CPMG sequence. The authors identify a two-photon relaxation process as a route for further optimization.",
    "why_it_matters": "A flopping-mode design reached 99.76% single-qubit gate fidelity at a five-millitesla field.",
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    "importance": 9,
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    "first_published_at": "2026-09-18T09:00:00.000-04:00",
    "modified_at": "2026-09-18T09:00:00.000-04:00",
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    "tags": [
      "spin qubits",
      "germanium",
      "low-power control"
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  "sources": [
    {
      "source_id": "source-2026-09-18-012",
      "title": "arXiv preprint 2609.20775",
      "publisher": "arXiv",
      "url": "https://arxiv.org/abs/2609.20775",
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      "published_at": "2026-09-17T13:47:24.000-04:00",
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    "name": "The Machine Press",
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  "cite_this_report": {
    "title": "The Germanium Spin Qubit Cut Drive Power by 25 Decibels",
    "publisher": "The Machine Press",
    "published_at": "2026-09-18T09:00:00.000-04:00",
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