{
  "annotation_id": "3412c8f9-35ae-402e-b09e-473211450613",
  "date_created": "2026-03-02T18:01:38.859000Z",
  "date_modified": "2026-03-02T18:01:38.859000Z",
  "file_hash": "d1324600efe1a33ed476a6df2bbb532356bdff371ca55474964f034a3dc148cd",
  "private": false,
  "record": {
    "abstract": "We have cooled a two-ion-crystal to the ground state of its collective modes\nof motion. Laser cooling, more specific resolved sideband cooling is performed\nsympathetically by illuminating only one of the two $^{40}$Ca$^+$ ions in the\ncrystal. The heating rates of the motional modes of the crystal in our linear\ntrap have been measured, and we found them considerably smaller than those\npreviously reported by Q. Turchette {\\em et. al.} Phys. Rev. A 61, 063418\n(2000) in the case of trapped $^9$Be$^+$ ions. After the ground state is\nprepared, coherent quantum state manipulation of the atomic population can be\nperformed. Within the coherence time, up to 12 Rabi oscillations are observed,\nshowing that many coherent manipulations can be achieved. Coherent excitation\nof each ion individually and ground state cooling are important tools for the\nrealization of quantum information processing in ion traps.",
    "arxiv_id": "quant-ph/0009031",
    "authors": [
      "H. Rohde",
      "S. T. Gulde",
      "C. F. Roos",
      "P. A. Barton",
      "D. Leibfried",
      "J. Eschner",
      "F. Schmidt-Kaler",
      "R. Blatt"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1088/1464-4266/3/1/357",
    "title": "Sympathetic ground state cooling and coherent manipulation with   two-ion-crystals",
    "url": "https://arxiv.org/abs/quant-ph/0009031"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "874bb3e6-744a-4cf1-9cfc-08eddc2fddcd",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}