{
  "annotation_id": "60d2869c-805b-409f-81eb-db8d298bb57d",
  "date_created": "2026-03-02T18:02:19.485000Z",
  "date_modified": "2026-03-02T18:02:19.485000Z",
  "file_hash": "63ebe1d83f9bb8b6082fb8b91c96122b1e2c7cb5efb4ba1df18864718fb080e9",
  "private": false,
  "record": {
    "abstract": "Given an ensemble of n spins, at least some of which are partially polarized,\nwe investigate the sharing of this polarization within a subspace of k spins.\nWe assume that the sharing results in a pseudopure state, characterized by a\nsingle purity parameter which we call the bias. As a concrete example we\nconsider ensembles of spin-1/2 nuclei in liquid-state nuclear magnetic\nresonance (NMR) systems. The shared bias levels are compared with some current\nentanglement bounds to determine whether the reduced subspaces can give rise to\nentangled states.",
    "arxiv_id": "quant-ph/0509036",
    "authors": [
      "M. S. Anwar",
      "J. A. Jones",
      "S. B. Duckett"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.73.022322",
    "journal_ref": "Phys. Rev. A 73, 022322 (2006)",
    "title": "Sharing Polarization within Quantum Subspaces",
    "url": "https://arxiv.org/abs/quant-ph/0509036"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "85d1e668-1f26-4cb2-a192-5b651c3799dd",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}