{
  "abstract": "We present a combined theory-experiment study to quantify spin diffusion in the square lattice quantum spin-1/2 XY model at finite temperature. On the theory side, we leverage a recently developed dynamical high-temperature expansion method to faithfully capture the long spatiotemporal scales of the hydrodynamic regime. Experimental results are obtained from an optical lattice hard-core boson quantum simulator. The excellent agreement of spin diffusion constants marks a breakthrough in spin-transport beyond one dimension and for the quantitative validation of state-of-the-art quantum simulation platforms. We also provide theory predictions for future experiments on dynamic spin conductivity or anisotropy-induced integrability breaking.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: Physical Review B 114, 094303 (2026)",
  "arxiv": "2605.20124",
  "author_total": 7,
  "authors": [
    {
      "name": "Erik Fitzner"
    },
    {
      "name": "Byungjin Lee"
    },
    {
      "name": "Junhyeok Hur"
    },
    {
      "name": "Minseok Kim"
    },
    {
      "name": "Benedikt Schneider"
    },
    {
      "name": "Jae-yoon Choi"
    },
    {
      "name": "Björn Sbierski"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/1mq5fk73vm6ka.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2605.20124",
  "fulltext_url": null,
  "id": "1mq5fk73vm6ka",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2605.20124",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.quant-gas"
    ],
    [
      "arxiv",
      "cond-mat.stat-mech"
    ],
    [
      "arxiv",
      "cond-mat.str-el"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2605.20124",
  "pmcid": null,
  "pmid": null,
  "published": "2026-08-28",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/1mq5fk73vm6ka.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:22Z",
      "native_id": "2605.20124",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2605.20124"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.quant-gas",
      "subfield": "amo"
    },
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.quant-gas",
      "subfield": "condensed-matter"
    },
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.stat-mech",
      "subfield": "statistical-nonlinear"
    }
  ],
  "title": "Finite-temperature spin diffusion in the two-dimensional XY model",
  "title_text": "Finite-temperature spin diffusion in the two-dimensional XY model",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:22Z",
  "url": "https://research.draconitic.com/paper/1mq5fk73vm6ka",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1103/whhg-tfv4",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}