{
  "annotation_id": "bb444b45-dd13-4e90-8905-7b2b3e646ce6",
  "date_created": "2026-03-02T18:02:16.591000Z",
  "date_modified": "2026-03-02T18:02:16.591000Z",
  "file_hash": "96d4cd98ef682e08ec276b4f63488696b5be732279477ee802d9cb43d075c017",
  "private": false,
  "record": {
    "abstract": "We propose an optical parametric down conversion (PDC) scheme that does not\nsuffer a trade-off between the state-purity of single-photon wave-packets and\nthe rate of packet production. This is accomplished by modifying the PDC\nprocess by using a microcavity to engineer the density of states of the optical\nfield at the PDC frequencies. The high-finesse cavity mode occupies a spectral\ninterval much narrower than the bandwidth of the pulsed pump laser field,\nsuppressing the spectral correlation, or entanglement, between signal and idler\nphotons. Spectral filtering of the field occurs prior to photon creation rather\nthan afterward as in most other schemes. Operator-Maxwell equations are solved\nto find the Schmidt-mode decomposition of the two-photon states produced.\nGreater than 99% pure-state packet production is predicted to be achievable.",
    "arxiv_id": "quant-ph/0504062",
    "authors": [
      "M. G. Raymer",
      "Jaewoo Noh",
      "K. Banaszek",
      "I. A. Walmsley"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.72.023825",
    "title": "Pure-state single-photon wave-packet generation by parametric down   conversion in a distributed microcavity",
    "url": "https://arxiv.org/abs/quant-ph/0504062"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "0b94b662-cc3c-4f3a-bf55-f8357d148df3",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}