{
  "abstract": "We theoretically study the non-Hermitian topology of magnons with finite lifetimes due to Gilbert damping. By incorporating the spin-wave theory and perturbation theory for the Landau-Lifshitz-Gilbert equation including nonlocal damping terms, we analytically evaluate the spectral winding number for point gaps, which indicates the existence of the non-Hermitian skin effect (NHSE). We find that, in noncollinear magnetic textures, the NHSE can occur even in the absence of nonlocal damping, due to the momentum-dependent mixing of the particle and hole components of magnon eigenmodes, which is absent in collinear magnets with a single magnon band. In the presence of nonlocal damping along one direction, we show that the winding number for an energy band with a unique minimum is determined from the sign of the wave number at the band minimum. We demonstrate these results using a model that hosts a skyrmion-string lattice as a steady state. We further investigate spin-wave propagation dynamics excited by a magnetic-field pulse and show that the propagation direction changes drastically from band to band depending on the presence of local and nonlocal damping, consistent with the nontrivial winding numbers.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: Phys. Rev. B 114, 194426 (2026)",
  "arxiv": "2605.07435",
  "author_total": 2,
  "authors": [
    {
      "name": "Yusuke Koyama"
    },
    {
      "name": "Yuki Kawaguchi"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/asxe2snb1e5td.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2605.07435",
  "fulltext_url": null,
  "id": "asxe2snb1e5td",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2605.07435",
  "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": null,
  "pdf_url": "https://arxiv.org/pdf/2605.07435",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-27",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/asxe2snb1e5td.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:35:50Z",
      "native_id": "2605.07435",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2605.07435"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mes-hall",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Point-gap topology of damped magnon excitations in skyrmion strings",
  "title_text": "Point-gap topology of damped magnon excitations in skyrmion strings",
  "type": "preprint",
  "updated_at": "2026-10-30T12:35:50Z",
  "url": "https://research.draconitic.com/paper/asxe2snb1e5td",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1103/gxr7-xtsr",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}