{
  "annotation_id": "18c19828-379d-4c37-9829-48dd65c70263",
  "date_created": "2026-03-02T18:02:06.631000Z",
  "date_modified": "2026-03-02T18:02:06.631000Z",
  "file_hash": "efa02d42c9cbf18f84e803268f14e0f402ea12b79a3ecdaad1fe747df78aeeea",
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  "record": {
    "abstract": "We analyze the effect of realistic noise sources for an atomic clock\nconsisting of a local oscillator that is actively locked to a spin-squeezed\n(entangled) ensemble of $N$ atoms. We show that the use of entangled states can\nlead to an improvement of the long-term stability of the clock when the\nmeasurement is limited by decoherence associated with instability of the local\noscillator combined with fluctuations in the atomic ensemble\u0027s Bloch vector.\nAtomic states with a moderate degree of entanglement yield the maximal clock\nstability, resulting in an improvement that scales as $N^{1/6}$ compared to the\natomic shot noise level.",
    "arxiv_id": "quant-ph/0401130",
    "authors": [
      "A. Andre",
      "A. S. Sorensen",
      "M. D. Lukin"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.92.230801",
    "journal_ref": "Phys. Rev. Lett. 92, 230801 (2004).",
    "title": "Stability of atomic clocks based on entangled atoms",
    "url": "https://arxiv.org/abs/quant-ph/0401130"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "d0395aca-6ee4-45e4-a506-b3e30d6dca05",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}