{
  "annotation_id": "7cadfca4-3961-4abd-93c5-891e304fa886",
  "date_created": "2026-03-02T18:01:49.512000Z",
  "date_modified": "2026-03-02T18:01:49.512000Z",
  "file_hash": "99d2b0219d99019175058e9c0af0de98fffafb8d7b916527f3f9d2b792d03ed8",
  "private": false,
  "record": {
    "abstract": "Entanglement may be considered a resource for quantum-information processing,\nas the origin of robust and universal equilibrium behaviour, but also as a\nlimit to the validity of an effective potential approach, in which the\ninfluence of certain interacting subsystems is treated as a potential. Here we\nshow that a closed three particle (two protons, one electron) model of a He-ion\nfeaturing realistic size, interactions and energy scales of electron and\nnucleus, respectively, exhibits different types of dynamics depending on the\ninitial state: For some cases the traditional approach, in which the nucleus\nonly appears as the center of a Coulomb potential, is valid, in others this\napproach fails due to entanglement arising on a short time-scale. Eventually\nthe system can even show signatures of thermodynamical behaviour, i.e. the\nelectron may relax to a maximum local entropy state which is, to some extent,\nindependent of the details of the initial state.",
    "arxiv_id": "quant-ph/0201135",
    "authors": [
      "J. Gemmer",
      "G. Mahler"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1209/epl/i2002-00222-0",
    "title": "Failure of Effective Potential Approach: Nucleus-Electron Entanglement   in the He-Ion",
    "url": "https://arxiv.org/abs/quant-ph/0201135"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "cd13d3f0-2e9b-448a-ad9e-f1f7b6a2848c",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}