{
  "annotation_id": "239c4edd-4e92-4890-aa5f-40fc6835d6cc",
  "date_created": "2026-03-02T18:02:03.519000Z",
  "date_modified": "2026-03-02T18:02:03.519000Z",
  "file_hash": "cedf07401fd47f5622e4c2aef92f56ccbf84ef40e3e5fd0faa7546c8d0476db8",
  "private": false,
  "record": {
    "abstract": "In practice, single photons are generated as a mixture of vacuum with a\nsingle photon with weights 1-p and p, respectively; here we are concerned with\nincreasing p by directing multiple copies of the single photon-vacuum mixture\ninto a linear optic device and applying photodetection on some outputs to\nconditionally prepare single photon states with larger p. We prove that it is\nimpossible, under certain conditions, to increase p via linear optics and\nconditional preparation based on photodetection, and we also establish a class\nof photodetection events for which p can be improved. In addition we prove that\nit is not possible to obtain perfect (p=1) single photon states via this method\nfrom imperfect (p\u003c1) inputs.",
    "arxiv_id": "quant-ph/0309140",
    "authors": [
      "Dominic W. Berry",
      "Stefan Scheel",
      "Barry C. Sanders",
      "Peter L. Knight"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.69.031806",
    "journal_ref": "Phys. Rev. A 69, 031806(R) (2004)",
    "title": "On improving single photon sources via linear optics and photodetection",
    "url": "https://arxiv.org/abs/quant-ph/0309140"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "c1806973-99cc-4b35-9d54-48c2bc32c20c",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}