{
  "annotation_id": "6ab250d4-a7fa-427d-9b11-43bed6c850a4",
  "date_created": "2026-03-02T18:02:20.583000Z",
  "date_modified": "2026-03-02T18:02:20.583000Z",
  "file_hash": "bca933564d33c6aab16ce3fb54bb541807a0f1409fc3280794b3b3b48b4e8f50",
  "private": false,
  "record": {
    "abstract": "Pairwise entanglement properties of a symmetric multi-qubit system are\nanalyzed through a complete set of two-qubit local invariants. Collective\nfeatures of entanglement, such as spin squeezing, are expressed in terms of\ninvariants and a classifcation scheme for pairwise entanglement is proposed.\nThe invariant criteria given here are shown to be related to the recently\nproposed (Phys. Rev. Lett. 95, 120502 (2005)) generalized spin squeezing\ninequalities for pairwise entanglement in symmetric multi-qubit states.",
    "arxiv_id": "quant-ph/0509056",
    "authors": [
      "A. R. Usha Devi",
      "M. S. Uma",
      "R. Prabhu",
      "Sudha"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1142/S0217979206034406",
    "journal_ref": "Int. J. Mod. Phys. B, Vol. 20, (2006) 1917-1933",
    "title": "Local Invariants and Pairwise Entanglement in Symmetric Multi-qubit   System",
    "url": "https://arxiv.org/abs/quant-ph/0509056"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "6985cd8d-b69b-49bd-9996-a214001fd640",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}