{
  "annotation_id": "53d42702-c56d-468d-8580-4b07605988ae",
  "date_created": "2026-03-02T18:02:17.093000Z",
  "date_modified": "2026-03-02T18:02:17.093000Z",
  "file_hash": "542558b637a8c3d45714ea7bb3e23a86213395df06f4c89b610b0731455e8f9f",
  "private": false,
  "record": {
    "abstract": "It is shown in this paper that decoherence-free subspace (DFS) of practical\nmulti-photon polarization can not avoid the exponential decoherence even in the\nsame extra-environment if the photons are frequency-anticorrelated. The reason\nlies in that the condition of collective decoherence is not satisfied in this\ncase. As an example, the evolution of biphoton\u0027s decoherence-free state is\ngiven. Possible solution for feasible multi-photon\u0027s DFS state is also given.",
    "arxiv_id": "quant-ph/0503120",
    "authors": [
      "Yong-Sheng Zhang",
      "Chuan-Feng Li",
      "Yun-Feng Huang",
      "Guang-Can Guo"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.72.012308",
    "journal_ref": "Phys. Rev. A 72, 012308 (2005)",
    "title": "Limitations of practical multi-photon decoherence-free states",
    "url": "https://arxiv.org/abs/quant-ph/0503120"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "35fe629e-d4b9-4069-89d4-8c4ebd6099a4",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}