{
  "abstract": "Directionally generating and controlling quantum states is critical in chiral quantum technologies. Here, we propose a scheme for the nonreciprocal generation of Bell states via cooperative dissipation in a qubit-magnon system, consisting of a superconducting transmon qubit and a yttrium iron garnet sphere subject to a bias magnetic field. The cooperative dissipation between them is induced by coupling both to a common transmission-line waveguide. Due to this cooperative dissipation, the system possesses a dark eigenstate within the single-excitation subspace. Under appropriate parameter conditions, the dark eigenstate reduces to a specific Bell state. With the assistance of a drive pulse, the system can be prepared in this Bell state (i.e., the dark eigenstate). In particular, we find that the dark eigenstate corresponds to different Bell states under positive ($+\\mathbf{B}_0$) and negative ($-\\mathbf{B}_0$) bias fields. Consequently, nonreciprocal Bell-state generation is achieved: $+\\mathbf{B}_0$ yields one Bell state, while $-\\mathbf{B}_0$ yields the other. Moreover, we define a fidelity-based nonreciprocal rate to quantify this nonreciprocity. Our work establishes cooperative dissipation as a versatile resource for nonreciprocal entangled-state generation, opening a promising route toward chiral quantum technologies.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2611.03011",
  "author_total": 5,
  "authors": [
    {
      "name": "Fei Gao"
    },
    {
      "name": "Xiang-Jing Geng"
    },
    {
      "name": "Wei Feng"
    },
    {
      "name": "Lijiong Shen"
    },
    {
      "name": "Guo-Qiang Zhang"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/6bkdtr7ddrx3e.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2611.03011",
  "fulltext_url": null,
  "id": "6bkdtr7ddrx3e",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2611.03011",
  "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": null,
  "pdf_url": "https://arxiv.org/pdf/2611.03011",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-02",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/6bkdtr7ddrx3e.ris",
  "sources": [
    {
      "first_seen": "2026-11-03T12:20:59Z",
      "native_id": "2611.03011",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2611.03011"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Nonreciprocal generation of Bell states via cooperative dissipation in a qubit-magnon system",
  "title_text": "Nonreciprocal generation of Bell states via cooperative dissipation in a qubit-magnon system",
  "type": "preprint",
  "updated_at": "2026-11-03T12:20:59Z",
  "url": "https://research.draconitic.com/paper/6bkdtr7ddrx3e",
  "venue": "arXiv",
  "versions": []
}