{
  "annotation_id": "82e1d0ad-b4df-4130-a92c-e3b5cc68c384",
  "date_created": "2026-03-02T18:02:30.282000Z",
  "date_modified": "2026-03-02T18:02:30.282000Z",
  "file_hash": "965c75ae5a1a396884d1efb17c12fad441f739f3bf630f7b1d6829954630eaa7",
  "private": false,
  "record": {
    "abstract": "We propose a general scheme to measure the concurrence of an arbitrary\ntwo-qubit pure state in atomic systems. The protocol is based on one- and\ntwo-qubit operations acting on two available copies of the bipartite system,\nand followed by a global qubit readout. We show that it is possible to encode\nthe concurrence in the probability of finding all atomic qubits in the ground\nstate. Two possible scenarios are considered: atoms crossing 3D microwave\ncavities and trapped ion systems.",
    "arxiv_id": "quant-ph/0611016",
    "authors": [
      "G. Romero",
      "C. E. Lopez",
      "F. Lastra",
      "E. Solano",
      "J. C. Retamal"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.75.032303",
    "journal_ref": "Phys. Rev. A 75, 032303 (2007).",
    "title": "Direct measurement of concurrence for atomic two-qubit pure states",
    "url": "https://arxiv.org/abs/quant-ph/0611016"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "3b66ef9e-1173-4155-b3ef-9c6aece08b4e",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}