{
  "abstract": "Excitonic effects dominate absorption and loss spectra in many materials. However, they are hard to access computationally, because of the cost of first-principles calculations and because of the scarce reliability of simple approximations. We overcome both limitations by combining a part of the electron-hole Bethe-Salpeter equation with an effective scalar interaction. The partitioning is motivated by the general form of the electron-hole interaction and it can be applied to all materials. First-principles calculations for prototypical semiconductors and insulators demonstrate a speedup of 1 to 2 orders of magnitude for results close to those where the full interaction matrix is used. The method is systematic and can be converged to the benchmark",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 3,
  "authors": [
    {
      "name": "Marc Aichner"
    },
    {
      "name": "Matteo Gatti"
    },
    {
      "name": "Lucia Reining"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/6aqjvyvk9v1d3.bib",
  "cited_by": 0,
  "doi": "10.1103/nk3g-crbw",
  "fulltext_url": null,
  "id": "6aqjvyvk9v1d3",
  "issns": [
    "0031-9007",
    "1079-7114"
  ],
  "landing_url": "https://hal.science/hal-05828334v1",
  "language": "en",
  "licence": "CC-BY-NC-ND-4.0",
  "licence_label": "CC BY-NC-ND 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "hal",
      "0.phys"
    ],
    [
      "hal",
      "1.phys.cond"
    ],
    [
      "hal",
      "2.phys.cond.cm-ms"
    ],
    [
      "openalex",
      "3107|Advanced Chemical Physics Studies"
    ]
  ],
  "openalex": "W7202242512",
  "pdf_url": "https://hal.science/hal-05828334/document",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-14",
  "publisher": "American Physical Society",
  "ris": "https://research.draconitic.com/paper/6aqjvyvk9v1d3.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:00Z",
      "native_id": "hal-05828334",
      "source": "hal",
      "url": "https://hal.science/hal-05828334v1"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "hal:1.phys.cond",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Effective residual interaction kernel approach for optical spectra",
  "title_text": "Effective residual interaction kernel approach for optical spectra",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:18:00Z",
  "url": "https://research.draconitic.com/paper/6aqjvyvk9v1d3",
  "venue": "Physical Review Letters",
  "versions": []
}