{
  "abstract": "Spin is typically traced out in the description of quantum-dot-based Kitaev chains to simplify the construction of Majorana fermions. Yet the intrinsic spin structure of poor-man's Majorana modes in minimal Kitaev chains under finite Zeeman fields offers a natural interface for the Kitaev parity qubit to interact with other spinful systems. Here, we establish such a platform to bridge the parity qubit and a quantum-dot spin qubit, with the effective coupling governed by the spin-dependent delocalization of the Majorana modes. Depending on whether the spin qubit is coupled to one or two chains constituting the parity qubit, the parity-spin coupling exhibits distinct forms: an anisotropic parity-conserving exchange interaction or a nontrivial exchange tensor tunable via the interchain superconducting-phase bias. Leveraging fast spin-qubit manipulation, we further demonstrate universal parity-qubit control, high-fidelity qubit-state readout, and entangling operations between the parity and spin qubits. These results turn the spinful structure of poor-man's Majoranas from a finite-field imperfection into a resource for hybrid quantum control.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.28924",
  "author_total": 4,
  "authors": [
    {
      "name": "Zhi-Hai Liu"
    },
    {
      "name": "Jiang Zhang"
    },
    {
      "name": "Guilu Long"
    },
    {
      "name": "H. Q. Xu"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/byag8a9canhc8.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.28924",
  "fulltext_url": null,
  "id": "byag8a9canhc8",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.28924",
  "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",
      "cond-mat.mes-hall"
    ],
    [
      "openalex",
      "3107|Quantum and electron transport phenomena"
    ]
  ],
  "openalex": "W7214348677",
  "pdf_url": "https://arxiv.org/pdf/2609.28924",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-24",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/byag8a9canhc8.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:24:11Z",
      "native_id": "2609.28924",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.28924"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mes-hall",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Quantum Gates Built on a Spin Qubit and a Kitaev Parity Qubit",
  "title_text": "Quantum Gates Built on a Spin Qubit and a Kitaev Parity Qubit",
  "type": "preprint",
  "updated_at": "2026-10-30T12:24:11Z",
  "url": "https://research.draconitic.com/paper/byag8a9canhc8",
  "venue": "arXiv",
  "versions": []
}