{
  "annotation_id": "2f081f43-4e25-4d2b-89aa-6317f124a628",
  "date_created": "2026-03-02T18:01:21.755000Z",
  "date_modified": "2026-03-02T18:01:21.755000Z",
  "file_hash": "5d35f8c3b48e7de4b3a97d11b56b5eeae7279619af56fe93556a6d27fe6de519",
  "private": false,
  "record": {
    "abstract": "We discuss the degree of anharmonicity of dipole plasmon resonances in metal\nclusters. We employ the time-dependent variational principle and show that the\nrelative shift of the second phonon scales as $N^{-4/3}$ in energy, $N$ being\nthe number of particles. This scaling property coincides with that for nuclear\ngiant resonances. Contrary to the previous study based on the boson-expansion\nmethod, the deviation from the harmonic limit is found to be almost negligible\nfor Na clusters, the result being consistent with the recent experimental\nobservation.",
    "arxiv_id": "physics/9901016",
    "authors": [
      "K. Hagino"
    ],
    "categories": [
      "physics.atm-clus",
      "nucl-th"
    ],
    "doi": "10.1103/PhysRevB.60.R2197",
    "title": "How harmonic is dipole resonance of metal clusters?",
    "url": "https://arxiv.org/abs/physics/9901016"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "b5022f05-62cd-4725-a898-ab771d03eb7b",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}