{
  "abstract": "One-dimensional non-Hermitian quasicrystals with parity and time-reversal (PT) symmetry can simultaneously exhibit localization-delocalization transition, topological phase transition, and PT-symmetry-breaking transition. This motivates us to investigate how the absence of PT symmetry impacts topological metal-insulator transitions in non-Hermitian quasicrystals. We propose a non-Hermitian quasiperiodic model that generally does not preserve PT-symmetry but, in most parameter regions, hosts a generic triple-transition scenario encompassing localization, topological, and degeneracy-breaking transitions. These transitions can be understood within the dual momentum-space representation featuring asymmetric couplings. Specifically, the localization boundary is obtained from the dual momentum-space representation by comparing the Lyapunov exponent, or inverse localization length, of the reciprocal Aubry-André model with the nonreciprocal hopping-asymmetry ratio of the dual lattice. The accompanying topological transition is characterized by a point-gap winding number defined with respect to a reference energy inside the complex spectral gap, whereas the degeneracy-breaking transition is understood from the loss of the reciprocal $n\\leftrightarrow -n$ spectral symmetry. The system also exhibits a localization-delocalization transition analogous to that in the Hermitian case, which occurs without accompanying topological or degeneracy-breaking transitions. Our work extends the topological metal-insulator transitions previously studied in PT-symmetric systems to a more general class of non-Hermitian setting, and further reveals that non-Hermitian systems can host distinct types of localization behavior.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: Phys. Rev. B 114, 305407 (2026)",
  "arxiv": "2605.25072",
  "author_total": 5,
  "authors": [
    {
      "name": "Guangjie Zhang"
    },
    {
      "name": "Bing Shao"
    },
    {
      "name": "Longwen Zhou"
    },
    {
      "name": "Jiangbin Gong"
    },
    {
      "name": "Weiwei Zhu"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/ezyx2fywdzaxh.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2605.25072",
  "fulltext_url": null,
  "id": "ezyx2fywdzaxh",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2605.25072",
  "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.dis-nn"
    ],
    [
      "arxiv",
      "cond-mat.mes-hall"
    ],
    [
      "arxiv",
      "quant-ph"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2605.25072",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-05",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/ezyx2fywdzaxh.ris",
  "sources": [
    {
      "first_seen": "2026-11-06T18:21:30Z",
      "native_id": "2605.25072",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2605.25072"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.dis-nn",
      "subfield": "condensed-matter"
    },
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Topological metal-insulator transitions in one-dimensional non-Hermitian quasicrystals: beyond PT-symmetry",
  "title_text": "Topological metal-insulator transitions in one-dimensional non-Hermitian quasicrystals: beyond PT-symmetry",
  "type": "preprint",
  "updated_at": "2026-11-09T00:20:33Z",
  "url": "https://research.draconitic.com/paper/ezyx2fywdzaxh",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1103/l7zn-3zr3",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}