{
  "annotation_id": "2b2cd012-3a2f-477a-946f-7697052859ce",
  "date_created": "2026-03-02T18:01:41.782000Z",
  "date_modified": "2026-03-02T18:01:41.782000Z",
  "file_hash": "0891c794edfca56745469ac5599382b4145262d54bf9eb02106bc3395d491f44",
  "private": false,
  "record": {
    "abstract": "For any mean value of a cartesian component of a spin vector we identify the\nsmallest possible uncertainty in any of the orthogonal components. The\ncorresponding states are optimal for spectroscopy and atomic clocks. We show\nthat the results for different spin J can be used to identify entanglement and\nto quantity the depth of entanglement in systems with many particles. With the\nprocedure developed in this letter, collective spin measurements on an ensemble\nof particles can be used as an experimental proof of multi-particle\nentanglement",
    "arxiv_id": "quant-ph/0011035",
    "authors": [
      "Anders Sorensen",
      "Klaus Molmer"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.86.4431",
    "journal_ref": "Phys. Rev. Lett. 86, 4431 (2001).",
    "title": "Entanglement and Extreme Spin Squeezing",
    "url": "https://arxiv.org/abs/quant-ph/0011035"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "c3143e78-7316-4f16-bdc7-9c75cf4f8b84",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}