{
  "annotation_id": "808125f8-0e5f-49a9-a4e2-d21e23ad61b4",
  "date_created": "2026-03-02T18:01:38.407000Z",
  "date_modified": "2026-03-02T18:01:38.407000Z",
  "file_hash": "e905746e1a3cd209a607afab159f1201d85b6ed59792252ef4a5668ec3f76b53",
  "private": false,
  "record": {
    "abstract": "Excited states and excitation energies of weakly bound systems, e.g. atomic\nfew-body systems and clusters, are difficult to study experimentally. For this\npurpose we propose a new and very general atom-optical method which is based on\ninelastic diffraction from transmission gratings. The technique is applicable\nto the recently found helium trimer molecule ^4He_3, allowing for the first\ntime an investigation of the possible existence of an excited trimer state and\ndetermination of its excitation energy. This would be of fundamental importance\nfor the famous Efimov effect.",
    "arxiv_id": "quant-ph/0002054",
    "authors": [
      "Gerhard C. Hegerfeldt",
      "Thorsten Koehler"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.84.3215",
    "title": "Towards the elusive Efimov state of the ^4He_3 molecule through a new   atom-optical state-selection technique",
    "url": "https://arxiv.org/abs/quant-ph/0002054"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "ce478066-de79-48f8-9a6f-c5afdc005dff",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}