{
  "annotation_id": "0bc67355-69f1-48b1-8847-8f9406fca610",
  "date_created": "2026-03-02T18:00:43.085000Z",
  "date_modified": "2026-03-02T18:00:43.085000Z",
  "file_hash": "88a33bc869fdcbc70a7d9ed761778ffbd5f85a7c12d902b48fcbeee19b8672d4",
  "private": false,
  "record": {
    "abstract": "We compute ground and excited state properties of small helium clusters 4He_N\ncontaining a single benzene impurity molecule. Ground-state structures and\nenergies are obtained for N=1,2,3,14 from importance-sampled, rigid-body\ndiffusion Monte Carlo (DMC). Excited state energies due to helium vibrational\nmotion near the molecule surface are evaluated using the projection operator,\nimaginary time spectral evolution (POITSE) method. We find excitation energies\nof up to ~23 K above the ground state. These states all possess vibrational\ncharacter of helium atoms in a highly anisotropic potential due to the aromatic\nmolecule, and can be categorized in terms of localized and collective\nvibrational modes. These results appear to provide precursors for a transition\nfrom localized to collective helium excitations at molecular nanosubstrates of\nincreasing size. We discuss the implications of these results for analysis of\nanomalous spectral features in recent spectroscopic studies of large aromatic\nmolecules in helium clusters.",
    "arxiv_id": "physics/0301064",
    "authors": [
      "Patrick Huang",
      "K. Birgitta Whaley"
    ],
    "categories": [
      "physics.chem-ph",
      "physics.atm-clus"
    ],
    "doi": "10.1103/PhysRevB.67.155419",
    "title": "Localized helium excitations in 4He_N-benzene clusters",
    "url": "https://arxiv.org/abs/physics/0301064"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "a9059311-278f-4216-874b-664ab598f82c",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}