{
  "annotation_id": "b8f5d270-9b3a-4852-bb25-51c6038a6f6d",
  "date_created": "2026-03-02T18:01:59.482000Z",
  "date_modified": "2026-03-02T18:01:59.482000Z",
  "file_hash": "3058fa4d2b5ebced8da340ab9a1cec1a36a60780fbb3ddde9617182ab03aad44",
  "private": false,
  "record": {
    "abstract": "A method for generating a mesoscopic superposition state of the collective\nspin variable of a gas of atoms is proposed. The state consists of a\nsuperposition of the atomic spins pointing in two slightly different\ndirections. It is obtained by using off resonant light to carry out Quantum Non\nDemolition Measurements of the spins. The relevant experimental conditions,\nwhich require very dense atomic samples, can be realized with presently\navailable techniques. Long-lived atomic superposition states may become useful\nas an off-line resource for quantum computing with otherwise linear operations.",
    "arxiv_id": "quant-ph/0306121",
    "authors": [
      "S. Massar",
      "E. S. Polzik"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.91.060401",
    "title": "Generation of Superposition Spin States in an Atomic Ensemble",
    "url": "https://arxiv.org/abs/quant-ph/0306121"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "ec62fdae-7f62-4683-b7d8-b801ae4e9cde",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}