{
  "annotation_id": "4a33a9b2-f5fb-4ab7-abf1-ed2f33304302",
  "date_created": "2026-03-02T18:01:14.698000Z",
  "date_modified": "2026-03-02T18:01:14.698000Z",
  "file_hash": "b99b5a2ab8e89ea3f9e70eea8dd3aeb86ac45a7718e9a189f836e7c66be139f3",
  "private": false,
  "record": {
    "abstract": "We present an experimental and theoretical study of a scalar atomic\nmagnetometer using an oscillating field-driven Zeeman resonance in a\nhigh-density optically-pumped potassium vapor. We describe an experimental\nimplementation of an atomic gradiometer with a noise level below 10\nfT/Hz^{1/2}, fractional field sensitivity below 10^{-9}/Hz^{1/2}, and an active\nmeasurement volume of about 1.5 cm^3. We show that the fundamental field\nsensitivity of a scalar magnetometer is determined by the rate of alkali-metal\nspin-exchange collisions even though the resonance linewidth can be made much\nsmaller than the spin-exchange rate by pumping most atoms into a stretched spin\nstate.",
    "arxiv_id": "physics/0611085",
    "authors": [
      "S. J. Smullin",
      "I. M. Savukov",
      "G. Vasilakis",
      "R. K. Ghosh",
      "M. V. Romalis"
    ],
    "categories": [
      "physics.atm-clus",
      "physics.atom-ph"
    ],
    "doi": "10.1103/PhysRevA.80.033420",
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "title": "A Low-Noise High-Density Alkali Metal Scalar Magnetometer",
    "url": "https://arxiv.org/abs/physics/0611085"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "85ce6146-ed37-406b-814d-e685026d3544",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}