{
  "annotation_id": "2ab33fdb-f0f1-4d9c-b8cd-209b43fa1427",
  "date_created": "2026-03-02T18:02:45.242000Z",
  "date_modified": "2026-03-02T18:02:45.242000Z",
  "file_hash": "6cc7978d11f807eff16842cd02bcd126557af20f34959e7ab1e0d6f2d6a2ded4",
  "private": false,
  "record": {
    "abstract": "We investigate the effect of cantori on momentum diffusion in a quantum\nsystem. Ultracold caesium atoms are subjected to a specifically designed\nperiodically pulsed standing wave. A cantorus separates two chaotic regions of\nthe classical phase space. Diffusion through the cantorus is classically\npredicted. Quantum diffusion is only significant when the classical phase-space\narea escaping through the cantorus per period greatly exceeds Planck\u0027s\nconstant. Experimental data and a quantum analysis confirm that the cantori act\nas barriers.",
    "arxiv_id": "quant-ph/9902025",
    "authors": [
      "K. M. D. Vant",
      "G. H. Ball",
      "H. Ammann",
      "N. L. Christensen"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevE.59.2846",
    "journal_ref": "Phys.Rev. E59 (1999) 2846-2852",
    "title": "Experimental evidence for the role of cantori as barriers in a quantum   system",
    "url": "https://arxiv.org/abs/quant-ph/9902025"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "24d98159-0c76-4cbf-a021-d04914604aa7",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}