{
  "annotation_id": "6467501f-7ea6-47d0-a7b4-9efe97f9c123",
  "date_created": "2026-03-02T18:01:41.427000Z",
  "date_modified": "2026-03-02T18:01:41.427000Z",
  "file_hash": "79716ab516e9634c8441eab4f35b95590137b72016762de881aede6cdc56d3a6",
  "private": false,
  "record": {
    "abstract": "The notion of spin squeezing has been discussed in this paper using the\ndensity matrix formalism. Extending the definition of squeezing for pure states\ngiven by Kitagawa and Ueda in an appropriate manner and employing the spherical\ntensor representation, we show that mixed spin states which are non-oriented\nand possess vector polarization indeed exhibit squeezing. We construct a mixed\nstate of a spin 1 system using two spin 1/2 states and study its squeezing\nbehaviour as a function of the individual polarizations of the two spinors.",
    "arxiv_id": "quant-ph/0010088",
    "authors": [
      "K. S. Mallesh",
      "Swarnamala Sirsi",
      "Mahmoud A. A. Sbaih",
      "P. N. Deepak",
      "G. Ramachandran"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1088/0305-4470/34/15/308",
    "journal_ref": "J. Phys. A : Math. Gen. 34 (2001) 3293",
    "title": "Spin squeezing of mixed systems",
    "url": "https://arxiv.org/abs/quant-ph/0010088"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "b7453042-d50a-48fe-8853-2318954dc3e1",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}