{
  "annotation_id": "0b6dd99c-d31b-44da-aa6b-d461facd26f2",
  "date_created": "2026-03-02T18:02:06.395000Z",
  "date_modified": "2026-03-02T18:02:06.395000Z",
  "file_hash": "a3d89a4ec33d91da3fa7588ea327608eeee112a680dd5c8cc5570997c496e792",
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  "record": {
    "abstract": "We present a kind of construction for a class of special matrices with at\nmost two different eigenvalues, in terms of some interesting multiplicators\nwhich are very useful in calculating eigenvalue polynomials of these matrices.\nThis class of matrices defines a special kind of quantum states --\n$d$-computable states. The entanglement of formation for a large class of\nquantum mixed states is explicitly presented.",
    "arxiv_id": "quant-ph/0405078",
    "authors": [
      "Shao-Ming Fei",
      "Xianqing Li-Jost"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1016/S0034-4877(04)90012-2",
    "journal_ref": "Rep. Math. Phys. 53 (2004) 195-210",
    "title": "A Class of Special Matrices and Quantum Entanglement",
    "url": "https://arxiv.org/abs/quant-ph/0405078"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "98955d0b-2753-46a0-a593-931e846b62ad",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}