{
  "annotation_id": "f588af6a-48c6-411a-a790-b6ea4c01aa86",
  "date_created": "2026-03-02T18:02:00.202000Z",
  "date_modified": "2026-03-02T18:02:00.202000Z",
  "file_hash": "5fc10ebdb37fe44b7373c97e4dca94c2a2ff50b392db627936ce52448da813d1",
  "private": false,
  "record": {
    "abstract": "We report on the first experimental realization of the entanglement witness\nfor polarization entangled photons. It represents a recently discovered\nsignificant quantum information protocol which is based on few local\nmeasurements. The present demonstration has been applied to the so-called\nWerner states, a family of \u0027\u0027mixed\u0027\u0027 quantum states that include both entangled\nand non entangled states. These states have been generated by a novel high\nbrilliance source of entanglement which allows to continuously tune the degree\nof mixedness.",
    "arxiv_id": "quant-ph/0307003",
    "authors": [
      "M. Barbieri",
      "F. De Martini",
      "G. Di Nepi",
      "P. Mataloni",
      "G. M. D\u0027Ariano",
      "C. Macchiavello"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.91.227901",
    "title": "Experimental Detection of Entanglement with Polarized Photons",
    "url": "https://arxiv.org/abs/quant-ph/0307003"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "fe1e79c6-ba4d-4e0c-91f4-818be09c0080",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}