{
  "annotation_id": "9cefc198-04d8-4c4e-afb3-d4f56b40d469",
  "date_created": "2026-03-02T18:02:41.594000Z",
  "date_modified": "2026-03-02T18:02:41.594000Z",
  "file_hash": "238ec9a343047d3ac7892b4a4b43524e72b171bedeba0e10ac4a993066d850e8",
  "private": false,
  "record": {
    "abstract": "The optimal precision of frequency measurements in the presence of\ndecoherence is discussed. We analyze different preparations of n two level\nsystems as well as different measurement procedures. We show that standard\nRamsey spectroscopy on uncorrelated atoms and optimal measurements on maximally\nentangled states provide the same resolution. The best resolution is achieved\nusing partially entangled preparations with a high degree of symmetry.",
    "arxiv_id": "quant-ph/9707014",
    "authors": [
      "S. F Huelga",
      "C. Macchiavello",
      "T. Pellizzari",
      "A. K. Ekert",
      "M. B. Plenio",
      "J. I. Cirac"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.79.3865",
    "journal_ref": "Phys.Rev.Lett. 79 (1997) 3865",
    "title": "On the Improvement of Frequency Stardards with Quantum Entanglement",
    "url": "https://arxiv.org/abs/quant-ph/9707014"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "ac8e080d-4516-493d-9ed3-2fa3c854c071",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}