{
  "annotation_id": "71922a1f-a9ec-429a-b6fd-b1245246fda2",
  "date_created": "2026-03-02T18:01:56.514000Z",
  "date_modified": "2026-03-02T18:01:56.514000Z",
  "file_hash": "1b2fc32fe0e632b440df5a06238ebfb5400fdd29caf392e3e590a5a4f493f556",
  "private": false,
  "record": {
    "abstract": "We report an experimental realization of entanglement concentration using two\npolarization-entangled photon pairs produced by pulsed parametric\ndown-conversion. In the meantime, our setup also provides a proof-in-principle\ndemonstration of a quantum repeater. The quality of our procedure is verified\nby observing a violation of Bell\u0027s inequality by more than 5 standard\ndeviations. The high experimental accuracy achieved in the experiment implies\nthat the requirement of tolerable error rate in multi-stage realization of\nquantum repeaters can be fulfilled, hence providing a practical toolbox for\nquantum communication over large distances.",
    "arxiv_id": "quant-ph/0301118",
    "authors": [
      "Zhi Zhao",
      "Tao Yang",
      "Yu-Ao Chen",
      "An-Ning Zhang",
      "Jian-Wei Pan"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.90.207901",
    "title": "Experimental Realization of Entanglement Concentration and A Quantum   Repeater",
    "url": "https://arxiv.org/abs/quant-ph/0301118"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "354ff323-3168-4bef-9bca-de0c3fac64bd",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}