{
  "annotation_id": "bceb9024-e753-4502-b640-f19f0a0835c2",
  "date_created": "2026-03-02T18:01:42.645000Z",
  "date_modified": "2026-03-02T18:01:42.645000Z",
  "file_hash": "e5b302a85bc75635bb52842edb42fe1152725c347d811fb26350a3850bdd595c",
  "private": false,
  "record": {
    "abstract": "So far experimental confirmation of entanglement has been restricted to\nqubits, i.e. two-state quantum systems including recent realization of three-\nand four-qubit entanglements. Yet, an ever increasing body of theoretical work\ncalls for entanglement in quantum system of higher dimensions. Here we report\nthe first realization of multi-dimensional entanglement exploiting the orbital\nangular momentum of photons, which are states of the electromagnetic field with\nphase singularities (doughnut modes). The properties of such states could be of\nimportance for the efforts in the field of quantum computation and quantum\ncommunication. For example, quantum cryptography with higher alphabets could\nenable one to increase the information flux through the communication channels.",
    "arxiv_id": "quant-ph/0104070",
    "authors": [
      "Alois Mair",
      "Alipasha Vaziri",
      "Gregor Weihs",
      "Anton Zeilinger"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1038/35085529",
    "journal_ref": "Nature, Vol.412, 3123-316 (2001)",
    "title": "Entanglement of Orbital Angular Momentum States of Photons",
    "url": "https://arxiv.org/abs/quant-ph/0104070"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "f69d84d7-5837-4942-b9e1-213e722e22fe",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}