{
  "annotation_id": "7f6c348c-886e-4427-8b4f-6fb50323c8b1",
  "date_created": "2026-03-02T18:00:59.872000Z",
  "date_modified": "2026-03-02T18:00:59.872000Z",
  "file_hash": "7b6d7468a15936b08f463681e5885a8795ea229c020629ace7d67d1db9637262",
  "private": false,
  "record": {
    "abstract": "Three-dimensional long-range ordered structures in smaller and\nnear-spherically symmetric Coulomb crystals of ^{40}Ca^+ ions confined in a\nlinear rf Paul trap have been observed when the number of ions exceeds ~1000\nions. This result is unexpected from ground state molecular dynamics (MD)\nsimulations, but found to be in agreement with MD simulations of metastable ion\nconfigurations. Previously, three-dimensional long-range ordered structures\nhave only been reported in Penning traps in systems of ~50,000 ions or more.",
    "arxiv_id": "physics/0508125",
    "authors": [
      "A. Mortensen",
      "E. Nielsen",
      "T. Matthey",
      "M. Drewsen"
    ],
    "categories": [
      "physics.plasm-ph"
    ],
    "doi": "10.1103/PhysRevLett.96.103001",
    "title": "Observation of Three-dimensional Long-range Order in Smaller Ion Coulomb   Crystals in an rf Trap",
    "url": "https://arxiv.org/abs/physics/0508125"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "edc4bbac-d905-424d-bb23-ff9d1d7330b1",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}