{
  "abstract": "Computing excitonic spectra in quasicrystal and super-moiré systems constitutes a formidable challenge due to the exceptional size of the excitonic Hilbert space. Here, we demonstrate a tensor-network method for the real-space Bethe-Salpeter Hamiltonian, allowing us to access the spectra of an excitonic 10^{18} 10 18 -dimensional Hamiltonian, and enabling the direct computation of bound-exciton spectral functions for systems exceeding one billion lattice sites, several orders of magnitude beyond the capabilities of conventional approaches. Our method combines a tensor-network encoding of the real-space Bethe-Salpeter Hamiltonian with a Chebyshev tensor network algorithm. This strategy bypasses explicit storage of the Hamiltonian while preserving full real-space resolution across widely different length scales. We demonstrate our methodology for one- and two-dimensional super-moiré systems, achieving the simultaneous resolution of atomistic and mesoscopic structures in the excitonic spectra in billion-size systems, showing exciton miniband formation and moiré-induced spatial confinement. Our results establish a real-space methodology enabling the simulation of excitonic physics in large-scale quasicrystal and super-moiré quantum matter.",
  "abstract_shown": true,
  "affiliations": [
    "Aalto University",
    "University of Utrecht"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 5,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Anouar Moustaj",
      "orcid": "0000-0002-9844-2987"
    },
    {
      "affs": [
        0
      ],
      "name": "Yitao Sun",
      "orcid": "0009-0002-9479-7147"
    },
    {
      "affs": [
        0
      ],
      "name": "Tiago Antão"
    },
    {
      "affs": [
        1
      ],
      "name": "Lumen Eek"
    },
    {
      "affs": [
        0
      ],
      "name": "Jose L. Lado",
      "orcid": "0000-0002-9916-1589"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/eehpqx80qqnx6.bib",
  "cited_by": 0,
  "doi": "10.21468/scipostphys.21.5.108",
  "fulltext_url": null,
  "id": "eehpqx80qqnx6",
  "issns": [
    "2542-4653"
  ],
  "landing_url": "http://scipost.org/SciPostPhys.21.5.108",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0",
  "metadata_licence": null,
  "native_subjects": [
    [
      "feed-journal",
      "physics/general"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://scipost.org/10.21468/SciPostPhys.21.5.108/pdf",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-02",
  "publisher": "Stichting SciPost",
  "ris": "https://research.draconitic.com/paper/eehpqx80qqnx6.ris",
  "sources": [
    {
      "first_seen": "2026-11-03T00:20:19Z",
      "native_id": "10.21468/scipostphys.21.5.108",
      "source": "feed-scipost",
      "url": "http://scipost.org/SciPostPhys.21.5.108"
    },
    {
      "first_seen": "2026-11-03T00:21:28Z",
      "native_id": "10.21468/scipostphys.21.5.108",
      "source": "crossref",
      "url": "https://scipost.org/10.21468/SciPostPhys.21.5.108"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "feed-journal:physics/general",
      "subfield": "general"
    }
  ],
  "title": "Tensor-network methodology for real-space super-moiré excitons",
  "title_text": "Tensor-network methodology for real-space super-moiré excitons",
  "type": "peer-reviewed",
  "updated_at": "2026-11-05T12:20:12Z",
  "url": "https://research.draconitic.com/paper/eehpqx80qqnx6",
  "venue": "SciPost",
  "versions": []
}