{
  "annotation_id": "cea24ecd-a0a3-4e58-b0d1-e158345935ee",
  "date_created": "2026-03-02T18:02:24.072000Z",
  "date_modified": "2026-03-02T18:02:24.072000Z",
  "file_hash": "50f32d79edff9d2b34400a414d5be1b8a87548c26e2133f218862ea11c422cce",
  "private": false,
  "record": {
    "abstract": "We discuss details of the preparation and detection of entangled\nelectron-nuclear spin states in 15N:C60 together with a quantitative evaluation\nof the complete density matrix. All four Bell states of a two qubit subsystem\nwere analyzed. In addition we find a quantum critical temperature of Tq = 7.73\nK for this system at an electron spin resonance frequency of 95 GHz.",
    "arxiv_id": "quant-ph/0602201",
    "authors": [
      "Werner Scherer",
      "Michael Mehring"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "Density Matrix Tomography of Entangled Electron and Nuclear Spin States   in 15N:C60",
    "url": "https://arxiv.org/abs/quant-ph/0602201"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "369600f4-3ac9-4cd4-8f99-544e20fa3bfe",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}