{
  "annotation_id": "5e7dd3d0-2b4d-4d4e-8929-704c5f7f9d67",
  "date_created": "2026-03-02T18:00:50.363000Z",
  "date_modified": "2026-03-02T18:00:50.363000Z",
  "file_hash": "323b3e1cafcf9f9cb2e36b249483e0601dd504da86ef26a84a9aef5f36de66be",
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  "record": {
    "abstract": "We investigate the electronic structure and properties of atoms exposed to a\nmagnetic quadrupole field. The spin-spatial as well as generalized time\nreversal symmetries are established and shown to lead to a two-fold degeneracy\nof the electronic states in the presence of the field. Low-lying as well as\nhighly excited Rydberg states are computed and analyzed for a broad regime of\nfield gradients. The delicate interplay between the Coulomb and various\nmagnetic interactions leads to complex patterns of the spatial spin\npolarization of individual excited states. Electromagnetic transitions in the\nquadrupole field are studied in detail thereby providing the selection rules\nand in particular the transition wavelengths and corresponding dipole\nstrengths. The peculiar property that the quadrupole magnetic field induces\npermanent electric dipole moments of the atoms is derived and discussed.",
    "arxiv_id": "physics/0402109",
    "authors": [
      "Igor Lesanovsky",
      "Joerg Schmiedmayer",
      "Peter Schmelcher"
    ],
    "categories": [
      "physics.atom-ph"
    ],
    "doi": "10.1103/PhysRevA.69.053405",
    "journal_ref": "Physical Review A 69, 053405 (2004)",
    "title": "Electronic Structure of Atoms in Magnetic Quadrupole Traps",
    "url": "https://arxiv.org/abs/physics/0402109"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "52fd9435-841c-4b6f-9190-885d2dafaad0",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}