{
  "annotation_id": "2f932c64-9ad4-49af-ac33-110a59745ea7",
  "date_created": "2026-03-02T18:01:52.098000Z",
  "date_modified": "2026-03-02T18:01:52.098000Z",
  "file_hash": "72323bf93b7aa2e9f992b5fc067827c8da11952bdc4747c01f2169ebd4ca37d0",
  "private": false,
  "record": {
    "abstract": "We investigate analytically a star network of spins, in which all spins\ninteract exclusively with a central spin through Heisenberg XX couplings of\nequal strength. We find that the central spin correlates and entangles the\nother spins at zero temperature to a degree that depends on the total number of\nspins. Surprisingly, the entanglement depends on the evenness or oddness of\nthis number and some correlations are substantial even for an infinite\ncollection of spins. We show how symmetric multi-party states for optimal\nsharing and splitting of entanglement can be obtained in this system using a\nmagnetic field.",
    "arxiv_id": "quant-ph/0208114",
    "authors": [
      "A. Hutton",
      "S. Bose"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "Mediated Entanglement And Correlations In A Star Network Of Interacting   Spins",
    "url": "https://arxiv.org/abs/quant-ph/0208114"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "5d23d888-4db3-4637-882d-ec95a2b35318",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}