{
  "annotation_id": "68d3754d-826b-439b-8a59-ad21042a5f0d",
  "date_created": "2026-03-02T18:02:24.136000Z",
  "date_modified": "2026-03-02T18:02:24.136000Z",
  "file_hash": "36b8597168c0eed9771cf3bca5d4bdb5e7c96bb8928097ac47de85b70b9c7c9e",
  "private": false,
  "record": {
    "abstract": "We show that a singlet of many multi-level quantum systems arises naturally\nas the ground state of a physically-motivated Hamiltonian. The Hamiltonian\nsimply exchanges the states of nearest-neighbours in some network of qudits\n(d-level systems); the results are independent of the strength of the couplings\nor the network\u0027s topology. We show that local measurements on some of these\nqudits project the unmeasured qudits onto a smaller singlet, regardless of the\nchoice of measurement basis at each measurement. It follows that the\nentanglement is highly persistent, and that through local measurements, a large\namount of entanglement may be established between spatially-separated parties\nfor subsequent use in distributed quantum computation.",
    "arxiv_id": "quant-ph/0602139",
    "authors": [
      "Christopher Hadley",
      "Sougato Bose"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.77.050308",
    "journal_ref": "Phys. Rev. A 77, 050308(R) (2008)",
    "title": "Multi-level, multi-party singlets as ground states and their role in   entanglement distribution",
    "url": "https://arxiv.org/abs/quant-ph/0602139"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "a28330a6-9c75-4e50-9716-5591cf7d9838",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}