{
  "annotation_id": "a2ac4985-44d1-431f-b05c-779685dde48f",
  "date_created": "2026-03-02T18:02:17.150000Z",
  "date_modified": "2026-03-02T18:02:17.150000Z",
  "file_hash": "2da2fbc69dee20d48f5870c43600e207a34c7e05f3112a5e72eb1596ffdc619a",
  "private": false,
  "record": {
    "abstract": "We study the conditions for generating spin squeezing via a quantum\nnon-demolition measurement in an ensemble of cold 87Rb atoms. By considering\nthe interaction of atoms in the 5S_{1/2}(F=1) ground state with probe light\ntuned near the D2 transition, we show that, for large detunings, this system is\nequivalent to a spin-1/2 system when suitable Zeeman substates and quantum\noperators are used to define a pseudo-spin. The degree of squeezing is derived\nfor the rubidium system in the presence of scattering causing decoherence and\nloss. We describe how the system can decohere and lose atoms, and predict as\nmuch as 75% spin squeezing for atomic densities typical of optical dipole\ntraps.",
    "arxiv_id": "quant-ph/0506084",
    "authors": [
      "S. R. de Echaniz",
      "M. W. Mitchell",
      "M. Kubasik",
      "M. Koschorreck",
      "H. Crepaz",
      "J. Eschner",
      "E. S. Polzik"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1088/1464-4266/7/12/016",
    "journal_ref": "J. Opt. B: Quantum Semiclass. Opt. 7 (2005) S548-S552",
    "title": "Conditions for spin squeezing in a cold 87Rb ensemble",
    "url": "https://arxiv.org/abs/quant-ph/0506084"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "dd11a3a6-1d54-4238-8f8c-f3445bbf0bb5",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}