{
  "annotation_id": "cdf1af37-d89a-4e6e-b1b0-6ce7f2a02299",
  "date_created": "2026-03-02T18:01:03.871000Z",
  "date_modified": "2026-03-02T18:01:03.871000Z",
  "file_hash": "885d8c2c43dcf5f08d7a39658d9d80105ab4d9b747d58bc6cc8828880da000f2",
  "private": false,
  "record": {
    "abstract": "We report an accurate measurement of the recoil velocity of Rb atoms based on\nBloch oscillations in a vertical accelerated optical lattice. We transfer about\n900 recoil momenta with an efficiency of 99.97 % per recoil. A set of 72\nmeasurements of the recoil velocity, each one with a relative uncertainty of\nabout 33 ppb in 20 min integration time, leads to a determination of the fine\nstructure constant alpha with a statistical relative uncertainty of 4.4 ppb.\nThe detailed analysis of the different systematic errors yields to a relative\nuncertainty of 6.7 ppb. The deduced value of 1/alpha is 137.03599878(91).",
    "arxiv_id": "physics/0510101",
    "authors": [
      "Pierre Clad\u00e9",
      "Estefania De Mirandes",
      "Malo Cadoret",
      "Sa\u00efda Guellati-Kh\u00e9lifa",
      "Catherine Schwob",
      "Fran\u00e7ois Nez",
      "Lucile Julien",
      "Fran\u00e7ois Biraben"
    ],
    "categories": [
      "physics.atom-ph"
    ],
    "doi": "10.1103/PhysRevLett.96.033001",
    "journal_ref": "Physical Review Letters 96 (2006) 033001",
    "title": "A new determination of the fine structure constant based on Bloch   oscillations of ultracold atoms in a vertical optical lattic",
    "url": "https://arxiv.org/abs/physics/0510101"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "540f2a32-33e6-442d-a7cf-449ef6f228d0",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}