{
  "annotation_id": "ddf8055c-5725-4241-a0de-bddafecba5f6",
  "date_created": "2026-03-02T18:02:00.148000Z",
  "date_modified": "2026-03-02T18:02:00.148000Z",
  "file_hash": "f3d1d16ce5146db9687d9d7a6a060d1fe0cacfbe670d032c843bc7a3dabf9dd5",
  "private": false,
  "record": {
    "abstract": "Bipartite correlations in multi-qubit systems cannot be shared freely. The\npresence of entanglement or classical correlation on certain pairs of qubits\nmay imply correlations on other pairs. We present a method of characterization\nof bi-partite correlations in multi-qubit systems using a concept of entangled\ngraphs that has been introduced in our earlier work [M.Plesch and V.Buzek,\nPhys. Rev. A 67, 012322 (2003)]. In entangled graphs each qubit is represented\nby a vertex while the entanglement and classical correlations are represented\nby two types of edges. We prove by construction that any entangled graph with\nclassical correlations can be represented by a mixed state of N qubits.\nHowever, not all entangled graphs with classical correlations can be\nrepresented by a pure state.",
    "arxiv_id": "quant-ph/0306001",
    "authors": [
      "Martin Plesch",
      "Vladimir Buzek"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.68.012313",
    "journal_ref": "Phys. Rev. A 68, 012313 (2003)",
    "title": "Entangled graphs II: Classical correlations in multi-qubit entangled   systems",
    "url": "https://arxiv.org/abs/quant-ph/0306001"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "39bcc897-8a95-40e4-8ce7-b850b9bf36fc",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}