{
  "annotation_id": "24343a1b-373d-499a-ad82-0e9901fdf325",
  "date_created": "2026-03-02T18:02:23.789000Z",
  "date_modified": "2026-03-02T18:02:23.789000Z",
  "file_hash": "144f604160b4d48f2b7e5b40eb984399dc05b94c564614baf2a3d3fa1c1aa521",
  "private": false,
  "record": {
    "abstract": "We develop a new entanglement measure by extending Jaeger\u0027s Minkowskian norm\nentanglement measure. This measure can be applied to a much wider class of\nmultipartite mixed states, although still \"quasi\" in the sense that it is still\nincapable of dividing precisely the sets of all separable and entangled states.\nAs a quadratic scalar function of the system density matrix, the quasi measure\ncan be easily expressed in terms of the so-called coherence vector of the\nsystem density matrix, by which we show the basic properties of the quasi\nmeasure including (1) zero-entanglement for all separable states, (2)\ninvariance under local unitary operations, and (3) non-increasing under local\nPOVM (positive operator-valued measure) measurements. These results open up\nperspectives in further studies of dynamical problems in open systems,\nespecially the dynamic evolution of entanglement, and the entanglement\npreservation against the environment-induced decoherence effects.",
    "arxiv_id": "quant-ph/0512256",
    "authors": [
      "Jing Zhang",
      "Chun-Wen Li",
      "Re-Bing Wu",
      "Tzyh-Jong Tarn",
      "Jian-Wu Wu"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.73.022319",
    "journal_ref": "Physical Review A, 2006, 73(2): 022319.",
    "title": "Quasi multipartite entanglement measure based on quadratic functions",
    "url": "https://arxiv.org/abs/quant-ph/0512256"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "43f04f74-5098-4ad9-8f28-f7129baf1021",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}