{
  "annotation_id": "3e5a7416-2e2c-44dd-b025-f6d2aa072d81",
  "date_created": "2026-03-02T18:01:59.818000Z",
  "date_modified": "2026-03-02T18:01:59.818000Z",
  "file_hash": "6cf4ee7abd94d4b4a7d41ed459806a3a4c9a38b427daf8876fda973c36ddd2e4",
  "private": false,
  "record": {
    "abstract": "Recently, Meyer and Wallach [D.A. Meyer and N.R. Wallach (2002), J. of Math.\nPhys., 43, pp. 4273] proposed a measure of multi-qubit entanglement that is a\nfunction on pure states. We find that this function can be interpreted as a\nphysical quantity related to the average purity of the constituent qubits and\nshow how it can be observed in an efficient manner without the need for full\nquantum state tomography. A possible realization is described for measuring the\nentanglement of a chain of atomic qubits trapped in a 3D optical lattice.",
    "arxiv_id": "quant-ph/0305094",
    "authors": [
      "Gavin K. Brennen"
    ],
    "categories": [
      "quant-ph"
    ],
    "journal_ref": "Quantum Information and Computation, vol. 3 (6), 619-626 (2003)",
    "title": "An observable measure of entanglement for pure states of multi-qubit   systems",
    "url": "https://arxiv.org/abs/quant-ph/0305094"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "165dbb7c-f77c-4596-b2ae-878e4c3e29eb",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}