{
  "annotation_id": "93cb4664-12d2-4a80-bea2-14c69b1baf6f",
  "date_created": "2026-03-02T18:02:37.041000Z",
  "date_modified": "2026-03-02T18:02:37.041000Z",
  "file_hash": "45d468a170552913f6312aca4d555eadc733961ad0f025c1b90f72fbe04fd61c",
  "private": false,
  "record": {
    "abstract": "If two separated observers are supplied with entanglement, in the form of $n$\npairs of particles in identical partly-entangled pure states, one member of\neach pair being given to each observer; they can, by local actions of each\nobserver, concentrate this entanglement into a smaller number of\nmaximally-entangled pairs of particles, for example Einstein-Podolsky-Rosen\nsinglets, similarly shared between the two observers. The concentration process\nasymptotically conserves {\\em entropy of entanglement}---the von Neumann\nentropy of the partial density matrix seen by either observer---with the yield\nof singlets approaching, for large $n$, the base-2 entropy of entanglement of\nthe initial partly-entangled pure state. Conversely, any pure or mixed\nentangled state of two systems can be produced by two classically-communicating\nseparated observers, drawing on a supply of singlets as their sole source of\nentanglement.",
    "arxiv_id": "quant-ph/9511030",
    "authors": [
      "Charles H. Bennett",
      "Herbert J. Bernstein",
      "Sandu Popescu",
      "Benjamin Schumacher"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.53.2046",
    "journal_ref": "Phys.Rev.A53:2046-2052,1996",
    "title": "Concentrating Partial Entanglement by Local Operations",
    "url": "https://arxiv.org/abs/quant-ph/9511030"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "05ae8ca6-3606-483e-9a54-89bcba7db7df",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}