{
  "annotation_id": "1323d16e-bf4f-4ef5-86f0-14ceb53a632d",
  "date_created": "2026-03-02T18:01:49.023000Z",
  "date_modified": "2026-03-02T18:01:49.023000Z",
  "file_hash": "864a35a10097895ffde034fb17d485e203ff9018d596c94eaaa50b413f0e7116",
  "private": false,
  "record": {
    "abstract": "We analyze a model for spin squeezing based on the so-called counter-twisting\nHamiltonian, including the effects of dissipation and finite system size. We\ndiscuss the conditions under which the Heisenberg limit, i.e. phase sensitivity\n$\\propto 1/N$, can be achieved. A specific implementation of this model based\non atom-atom interactions via quantized photon exchange is presented in detail.\nThe resulting excitation corresponds to the creation of spin-flipped atomic\npairs and can be used for fast generation of entangled atomic ensembles, spin\nsqueezing and apllications in quantum information processing. The conditions\nfor achieving strong spin squeezing with this mechanism are also analyzed.",
    "arxiv_id": "quant-ph/0112126",
    "authors": [
      "A. Andr\u00e9",
      "M. D. Lukin"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.65.053819",
    "journal_ref": "Phys. Rev. A 65, 053819 (2002).",
    "title": "Atom correlations and spin squeezing near the Heisenberg limit: finite   system size effect and decoherence",
    "url": "https://arxiv.org/abs/quant-ph/0112126"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "3c93b962-9518-4c6c-bb5c-de1975c62de8",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}