{
  "annotation_id": "a0a16b5c-0da8-449f-a35a-c0119ca735a4",
  "date_created": "2026-03-02T18:01:38.857000Z",
  "date_modified": "2026-03-02T18:01:38.857000Z",
  "file_hash": "b972d2e57476a532c3661f50fd98dd7cb6f14f8f6c7f4aee30c22b4d05435ee5",
  "private": false,
  "record": {
    "abstract": "We consider a special kind of mixed states -- a {\\it Werner derivative},\nwhich is the state transformed by nonlocal unitary -- local or nonlocal --\noperations from a Werner state. We show the followings. (i) The amount of\nentanglement of Werner derivatives cannot exceed that of the original Werner\nstate. (ii) Although it is generally possible to increase the entanglement of a\nsingle copy of a Werner derivative by LQCC, the maximal possible entanglement\ncannot exceed the entanglement of the original Werner state. The extractable\nentanglement of Werner derivatives is limited by the entanglement of the\noriginal Werner state.",
    "arxiv_id": "quant-ph/0003058",
    "authors": [
      "Tohya Hiroshima",
      "Satoshi Ishizaka"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.62.044302",
    "journal_ref": "Phys. Rev. A 62, 044302 (2000)",
    "title": "Local and Nonlocal Properties of Werner States",
    "url": "https://arxiv.org/abs/quant-ph/0003058"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "63cc49c1-589a-4ea1-bb99-ae1e0efcdddf",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}