{
  "annotation_id": "d0635c3d-246a-4357-80b4-51e3cefd1738",
  "date_created": "2026-03-02T18:01:38.780000Z",
  "date_modified": "2026-03-02T18:01:38.780000Z",
  "file_hash": "ab442f24724b06bb1122e97f0dbb1273f86625f01ede15a7ddcff2916dc7d014",
  "private": false,
  "record": {
    "abstract": "Quantum entanglement cannot be unlimitedly shared among arbitrary number of\nqubits. Larger the number of entangled pairs in an N-qubit system, smaller the\ndegree of bi-partite entanglement is. We analyze a system of N qubits in which\nan arbitrary pair of particles is entangled. We show that the maximum degree of\nentanglement (measured in the concurrence) between any pair of qubits is 2/N.\nThis tight bound can be achieved when the qubits are prepared in a pure\nsymmetric (with respect to permutations) state with just one qubit in the basis\nstate |0\u003e and the others in the basis state |1\u003e.",
    "arxiv_id": "quant-ph/0007086",
    "authors": [
      "Masato Koashi",
      "Vladimir Buzek",
      "Nobuyuki Imoto"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.62.050302",
    "title": "Entangled webs: Tight bound for symmetric sharing of entanglement",
    "url": "https://arxiv.org/abs/quant-ph/0007086"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "80e3f12d-42de-4fec-bf89-dc636bf2b3bd",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}