{
  "annotation_id": "5787c68d-9f10-4387-b1a7-1c959e915d8a",
  "date_created": "2026-03-02T18:00:38.506000Z",
  "date_modified": "2026-03-02T18:00:38.506000Z",
  "file_hash": "b2c79f937940f75677dc6d65f23ff56786e6f1118c021b30bc753b8e0649c319",
  "private": false,
  "record": {
    "abstract": "We simultaneously trap ultracold lithium and cesium atoms in an optical\ndipole trap formed by the focus of a CO$_2$ laser and study the exchange of\nthermal energy between the gases. The cesium gas, which is optically cooled to\n$20 \\mu$K, efficiently decreases the temperature of the lithium gas through\nsympathetic cooling. The measured cross section for thermalizing\n$^{133}$Cs-$^7$Li collisions is $8 \\times 10^{-12}$ cm$^2$, for both species in\ntheir lowest hyperfine ground state. Besides thermalization, we observe\nevaporation of lithium purely through elastic cesium-lithium collisions\n(sympathetic evaporation).",
    "arxiv_id": "physics/0111213",
    "authors": [
      "M. Mudrich",
      "S. Kraft",
      "K. Singer",
      "R. Grimm",
      "A. Mosk",
      "M. Weidemuller"
    ],
    "categories": [
      "physics.atom-ph",
      "physics.gen-ph"
    ],
    "doi": "10.1103/PhysRevLett.88.253001",
    "journal_ref": "Phys. Rev. Lett. 88, 253001 (2002).",
    "title": "Sympathetic Cooling with Two Atomic Species in an Optical Trap",
    "url": "https://arxiv.org/abs/physics/0111213"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "506e1822-f3bb-4b60-becf-9aa3ad6bd02e",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}