{
  "annotation_id": "f62801bd-d1f0-4649-89d1-73aace5703a5",
  "date_created": "2026-03-02T18:02:24.249000Z",
  "date_modified": "2026-03-02T18:02:24.249000Z",
  "file_hash": "60d144e0e3fc12486f37022de695124ff28000c79d434c42cce6627014d7bd09",
  "private": false,
  "record": {
    "abstract": "When comparing quantum states to each other, it is possible to obtain an\nunambiguous answer, indicating that the states are definitely different,\nalready after a single measurement. In this paper we investigate comparison of\ncoherent states, which is the simplest example of quantum state comparison for\ncontinuous variables. The method we present has a high success probability, and\nis experimentally feasible to realize as the only required components are beam\nsplitters and photon detectors. An easily realizable method for quantum state\ncomparison could be important for real applications. As examples of such\napplications we present a \"lock and key\" scheme and a simple scheme for quantum\npublic key distribution.",
    "arxiv_id": "quant-ph/0601130",
    "authors": [
      "Erika Andersson",
      "Marcos Curty",
      "Igor Jex"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.74.022304",
    "journal_ref": "Phys. Rev. A 74, 022304 (2006)",
    "title": "Experimentally realizable quantum comparison of coherent states and its   applications",
    "url": "https://arxiv.org/abs/quant-ph/0601130"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "106244df-db22-48bc-b1c2-1de7fc3ce0ce",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}