{
  "annotation_id": "6a3e2d83-7322-4ae6-8170-f3867878f314",
  "date_created": "2026-03-02T18:00:56.437000Z",
  "date_modified": "2026-03-02T18:00:56.437000Z",
  "file_hash": "bb6d4402ea59bff44a86fd63b215b14f699e27dcc5d7705a99dfa493d53b0b59",
  "private": false,
  "record": {
    "abstract": "Based on the idea that four excited electrons arrange themselves around the\nnucleus in the corners of a pyramid in order to minimize their mutual\nrepulsion, we present an analytical model of quadruply excited states. The\nmodel shows excellent comparison with ab initio results and provides a clear\nphysical picture of the intrinsic motion of the four electrons. The model is\nused to predict configuration-mixing fractions and spectra of these highly\ncorrelated states.",
    "arxiv_id": "physics/0501080",
    "authors": [
      "Marianne Dahlerup Poulsen",
      "Lars Bojer Madsen"
    ],
    "categories": [
      "physics.atom-ph"
    ],
    "doi": "10.1103/PhysRevA.71.062502",
    "journal_ref": "Phys. Rev. A 71, 062502 (2005).",
    "title": "Pyramidal Atoms: Berylliumlike Hollow States",
    "url": "https://arxiv.org/abs/physics/0501080"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "92137dee-afe2-460c-aa3a-8bf986ab169c",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}