{
  "abstract": "The 0-π qubit promises longer lifetimes than the transmon, making it a strong candidate for a next-generation, lower-error qubit. Gyenis et al. experimentally demonstrated an unprotected single-qubit gate in the soft 0-π regime [1], but no corresponding two-qubit gate has yet been proposed. We propose an unprotected CZ gate for capacitively coupled soft 0-π qubits. The gate uses a direct transition between a computational state and a higher non-computational state. Assuming negligible device disorder and a phenomenological noise model, the simulated CZ gate achieves a fidelity of approximately 99.9% at a gate time of approximately 160 ns.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.16630",
  "author_total": 3,
  "authors": [
    {
      "name": "Zhenxing Liu"
    },
    {
      "name": "Eli Weissler"
    },
    {
      "name": "Joshua Combes"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/de5qhg5dqq148.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.16630",
  "fulltext_url": null,
  "id": "de5qhg5dqq148",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.16630",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "quant-ph"
    ],
    [
      "openalex",
      "1702|Quantum Information and Cryptography"
    ]
  ],
  "openalex": "W7213396912",
  "pdf_url": "https://arxiv.org/pdf/2609.16630",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-15",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/de5qhg5dqq148.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:21:41Z",
      "native_id": "2609.16630",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.16630"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Two-qubit gates for the soft 0-π qubit",
  "title_text": "Two-qubit gates for the soft 0-π qubit",
  "type": "preprint",
  "updated_at": "2026-10-30T12:21:41Z",
  "url": "https://research.draconitic.com/paper/de5qhg5dqq148",
  "venue": "arXiv",
  "versions": []
}