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    "story_id": "mp-2026-09-13-014",
    "source_story_id": "tmp-story-conditional-squeezing-superconducting",
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    "headline": "A Qubit Chose Which Way the Resonator Squeezed",
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    "dek": "Refocusing suppressed slow unwanted terms in a proposed superconducting gate and pushed optimistic simulated encoding fidelity above 0.99.",
    "summary": "Refocusing suppressed slow unwanted terms in a proposed superconducting gate and pushed optimistic simulated encoding fidelity above 0.99.",
    "body_text": "The proposed conditional-squeezing gate drives a SQUID-terminated resonator along a direction set by a dispersively coupled qubit. A refocusing sequence suppresses slowly varying unwanted terms during state-dependent parametric resonance. The authors use the gate to encode arbitrary qubit states into superpositions of one- and two-mode squeezed resonator states whose parity can reveal errors. Under experimentally optimistic nonlinearities and decay rates, simulated encoding fidelity exceeded 0.99. Kerr nonlinearities and dissipation remain the limiting mechanisms, and the work presents an implementation route rather than a reported hardware demonstration.",
    "why_it_matters": "Refocusing suppressed slow unwanted terms in a proposed superconducting gate and pushed optimistic simulated encoding fidelity above 0.99.",
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      "Kerr nonlinearities and dissipation remain the limiting mechanisms, and the work presents an implementation route rather than a reported hardware demonstration."
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    "first_published_at": "2026-09-13T09:00:00.000-04:00",
    "modified_at": "2026-09-13T09:00:00.000-04:00",
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        "qualification": "Kerr nonlinearities and dissipation remain the limiting mechanisms, and the work presents an implementation route rather than a reported hardware demonstration."
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    "tags": [
      "superconducting circuits",
      "bosonic codes",
      "squeezing"
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  "sources": [
    {
      "source_id": "source-2026-09-13-014",
      "title": "arXiv preprint 2609.10655",
      "publisher": "arXiv",
      "url": "https://arxiv.org/abs/2609.10655",
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    "title": "A Qubit Chose Which Way the Resonator Squeezed",
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    "published_at": "2026-09-13T09:00:00.000-04:00",
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