{
  "abstract": "We construct and analyse orientifold descendants of a six-dimensional type IIB $\\mathbb Z_{12}$ quasicrystalline orbifold. The parent background is defined by a Narain-lattice automorphism that is not crystallographic on the geometric torus. We determine the closed-string spectrum and twisted-sector orbit structure, construct a compatible unoriented projection, and compute the Klein bottle, annulus and Möbius strip amplitudes. Tadpole cancellation selects boundary orbits that admit a partially T-dual description as D7-branes at angles and fixes the Chan-Paton gauge group and massless spectrum. The resulting supersymmetric six-dimensional vacuum satisfies the irreducible anomaly constraints, its reducible anomaly polynomial factorizes through the Green-Schwarz mechanism, and its anomaly lattice obeys the Kim-Shiu-Vafa string-probe bound. We also construct a Brane Supersymmetry Breaking descendant with a perturbatively tachyon-free rigid branch, and a freely acting five-dimensional orientifold whose two decompactification limits reproduce a geometric type IIA $\\mathbb Z_3$ orientifold and an antisymmetric type IIB $\\mathbb Z_4$ orientifold. These examples show that quasicrystalline closed-string backgrounds can admit controlled perturbative open-string completions with non-trivial boundary and crosscap sectors.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.35997",
  "author_total": 1,
  "authors": [
    {
      "name": "Antony Wendels"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/3wxfsv7g2csxk.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.35997",
  "fulltext_url": null,
  "id": "3wxfsv7g2csxk",
  "issns": [],
  "landing_url": "https://hal.science/hal-05784544v1",
  "language": "en",
  "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",
      "hep-th"
    ],
    [
      "hal",
      "0.phys"
    ],
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      "hal",
      "1.phys.hthe"
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    [
      "openalex",
      "3106|Black Holes and Theoretical Physics"
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  ],
  "openalex": "W7214938726",
  "pdf_url": "https://arxiv.org/pdf/2609.35997",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-28",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/3wxfsv7g2csxk.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:50Z",
      "native_id": "hal-05784544",
      "source": "hal",
      "url": "https://hal.science/hal-05784544v1"
    },
    {
      "first_seen": "2026-10-30T12:25:31Z",
      "native_id": "2609.35997",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.35997"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-th",
      "subfield": "high-energy"
    }
  ],
  "title": "D-branes and orientifolds on quasicrystalline orbifold backgrounds",
  "title_text": "D-branes and orientifolds on quasicrystalline orbifold backgrounds",
  "type": "preprint",
  "updated_at": "2026-10-30T12:25:31Z",
  "url": "https://research.draconitic.com/paper/3wxfsv7g2csxk",
  "venue": "HAL",
  "versions": []
}