{
  "annotation_id": "4ccf8a6f-42c4-49b8-bc95-c9acf9a7e551",
  "date_created": "2026-03-02T18:02:48.607000Z",
  "date_modified": "2026-03-02T18:02:48.607000Z",
  "file_hash": "0bcd45418495c2cd859b7cdf4e5c26df75356615abfa19db11c4fa3f90a6caaf",
  "private": false,
  "record": {
    "abstract": "Suppose two distant observers Alice and Bob share a pure biparticle entangled\nstate secretly chosen from a set, it is shown that Alice (Bob) can\nprobabilistic concentrate the state to a maximally entangled state by applying\nlocal operations and classical communication (LQCC) if and only if the states\nin the set share the same marginal density operator for her (his) subsystem.\nApplying this result, we present probabilistic superdense coding and show that\nperfect purification of mixed state is impossible using only LQCC on individual\nparticles.",
    "arxiv_id": "quant-ph/9910018",
    "authors": [
      "Chuan-Wei Zhang",
      "Chuan-Feng Li",
      "Guang-Can Guo"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "No-Concentrating Theorem of Pure Entangled States",
    "url": "https://arxiv.org/abs/quant-ph/9910018"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "ba7adb41-cfa6-47be-ab84-372735eb70cc",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}