{
  "annotation_id": "4d9d2b2b-774b-4bb9-a8f6-f8ac30765704",
  "date_created": "2026-03-02T18:02:30.556000Z",
  "date_modified": "2026-03-02T18:02:30.556000Z",
  "file_hash": "accf7c8817382b5fe55b71b27270a8412acfceb76351b37c25a6f069d731bc59",
  "private": false,
  "record": {
    "abstract": "We present a protocol that allows us to obtain the concurrence of any two\nqubit pure state by performing a minimal and optimal tomography of one of the\nsubsystems through measuring a single observable of an ancillary four\ndimensional qudit. An implementation for a system of trapped ions is also\nproposed, which can be achieved with present day experimental techniques.",
    "arxiv_id": "quant-ph/0611015",
    "authors": [
      "A. Salles",
      "F. de Melo",
      "J. C. Retamal",
      "R. L. de Matos Filho",
      "N. Zagury"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.74.060303",
    "journal_ref": "Phys. Rev. A 74, 060303R (2006)",
    "title": "Single observable concurrence measurement without simultaneous copies",
    "url": "https://arxiv.org/abs/quant-ph/0611015"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "f54abf56-e69c-4ad8-a4fb-55e295601b34",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}