{
  "annotation_id": "da09b59f-a125-46a9-8c29-de75c2990ab4",
  "date_created": "2026-03-02T18:02:00.214000Z",
  "date_modified": "2026-03-02T18:02:00.214000Z",
  "file_hash": "e90cd94cf54419ccc6833f0c7abe705aea36e999c77d28d0af27cfd8aa640f25",
  "private": false,
  "record": {
    "abstract": "We demonstrate the cooling of a two species ion crystal consisting of one\n$^9Be^+$ and one $^{24}Mg^+$ ion. Since the respective cooling transitions of\nthese two species are separated by more than 30 nm, laser manipulation of one\nion has negligible effect on the other even when the ions are not individually\naddressed. As such this is a useful system for re-initializing the motional\nstate in an ion trap quantum computer without affecting the qubit information.\nAdditionally, we have found that the mass difference between ions enables a\nnovel method for detecting and subsequently eliminating the effects of radio\nfrequency (RF) micro-motion.",
    "arxiv_id": "quant-ph/0307088",
    "authors": [
      "M. D. Barrett",
      "B. DeMarco",
      "T. Schaetz",
      "D. Leibfried",
      "J. Britton",
      "J. Chiaverini",
      "W. M. Itano",
      "B. Jelenkovic",
      "J. D. Jost",
      "C. Langer",
      "T. Rosenband",
      "D. J. Wineland"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.68.042302",
    "title": "Sympathetic cooling of $^9Be^+$ and $^{24}Mg^+$ for quantum logic",
    "url": "https://arxiv.org/abs/quant-ph/0307088"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "404eee02-65a9-4d63-bc67-be02cf4b934f",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}