{
  "annotation_id": "3dfe855e-53c3-4f5b-8f19-010488c74977",
  "date_created": "2026-03-02T18:02:06.437000Z",
  "date_modified": "2026-03-02T18:02:06.437000Z",
  "file_hash": "efb4401dede4f261f80a6a25008785e3fa9ec2f8a4373d79c336a1d9ea6fdb99",
  "private": false,
  "record": {
    "abstract": "We analyze the resilience under photon loss of the bi-partite entanglement\npresent in multi-photon states produced by parametric down-conversion. The\nquantification of the entanglement is made possible by a symmetry of the states\nthat persists even under polarization-independent losses. We examine the\napproach of the states to the set of states with a positive partial transpose\nas losses increase, and calculate the relative entropy of entanglement. We find\nthat some bi-partite distillable entanglement persists for arbitrarily high\nlosses.",
    "arxiv_id": "quant-ph/0402053",
    "authors": [
      "G. A. Durkin",
      "C. Simon",
      "J. Eisert",
      "D. Bouwmeester"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.70.062305",
    "journal_ref": "Phys. Rev. A 70, 062305 (2004)",
    "title": "Resilience of multi-photon entanglement under losses",
    "url": "https://arxiv.org/abs/quant-ph/0402053"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "d6a699d4-12ce-4868-bca0-324198c26f3f",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}