{
  "annotation_id": "3ab3b769-1b37-4e55-83e4-251eedc2f6ae",
  "date_created": "2026-03-02T18:01:07.419000Z",
  "date_modified": "2026-03-02T18:01:07.419000Z",
  "file_hash": "cc1da5ec959650d542206dc52795a6fb76b1fe093a537353ec2ca2f2d6f37082",
  "private": false,
  "record": {
    "abstract": "The paper reports an exact solution for the problem of spin evolution of\nradical ion pair in static magnetic and resonant microwave field taking into\naccount Zeeman and hyperfine interactions and spin relaxation. The values of\nparameters that provide one of the four possible types of solution are\nanalysed. It is demonstrated that in the absence of spin relaxation, besides\nthe zero field invariant an invariant at large amplitudes of the resonant\nmicrowave field can be found. The two invariants open the possibility for\nsimple calculation of microwave pulses to control quantum state of the radical\npair. The effect of relaxation on the invariants is analysed and it is shown\nthat changes in the high field invariant are induced by phase relaxation.",
    "arxiv_id": "physics/0602016",
    "authors": [
      "S. V. Anishchik",
      "V. N. Verkhovlyuk",
      "V. A. Bagryansky"
    ],
    "categories": [
      "physics.chem-ph",
      "quant-ph"
    ],
    "doi": "10.1088/0953-4075/39/9/010",
    "title": "Time evolution of spin state of radical ion pair in microwave field: An   analytical solution",
    "url": "https://arxiv.org/abs/physics/0602016"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "cd940b41-20bb-406d-8e33-c2723bc2dbd2",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}