{
  "annotation_id": "77a7feb9-fa97-4c43-b2cd-ab3958ea8383",
  "date_created": "2026-03-02T18:01:42.207000Z",
  "date_modified": "2026-03-02T18:01:42.207000Z",
  "file_hash": "448ccd1a90298e45e9aed2c6c8e11b19e86da311e6f263c52c4539cc5ce64bf1",
  "private": false,
  "record": {
    "abstract": "Real sources of entangled photon pairs (like parametric down conversion) are\nnot perfect. They produce quantum states that contain more than only one photon\npair with some probability. In this paper it is discussed what happens if such\nstates are used for the purpose of quantum key distribution. It is shown that\nthe presence of \"multi-pair\" signals (together with low detection efficiencies)\ncauses errors in transmission even if there is no eavesdropper. Moreover, it is\nshown that even the eavesdropping, that draws information only from these\n\"multi-pair\" signals, increases the error rate. Information, that can be\nobtained by an eavesdropper from these signals, is calculated.",
    "arxiv_id": "quant-ph/0011007",
    "authors": [
      "Miloslav Dusek",
      "Kamil Bradler"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "The effect of multi-pair signal states in quantum cryptography with   entangled photons",
    "url": "https://arxiv.org/abs/quant-ph/0011007"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "10912399-3995-4440-a033-fda46770deb8",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}