{
  "annotation_id": "1df93c85-c991-41bd-838b-8f1743633789",
  "date_created": "2026-03-02T18:01:58.980000Z",
  "date_modified": "2026-03-02T18:01:58.980000Z",
  "file_hash": "66a3e4791b195acab89ade27c46aad12fb8793ba1208137eba91b73f306a4f6f",
  "private": false,
  "record": {
    "abstract": "We study distinguishing information in the context of quantum interference\ninvolving more than one parametric downconversion (PDC) source and in the\ncontext of polarization-entangled photon pairs based on PDC. We arrive at\nspecific design criteria for two-photon sources so that when used as part of\ncomplex optical systems, such as photon-based quantum information processing\nschemes, distinguishing information between the photons is eliminated\nguaranteeing high visibility interference. We propose practical techniques\nwhich lead to suitably engineered two-photon states that can be realistically\nimplemented with available technology. Finally, we study an implementation of\nthe nonlinear-sign shift (NS) logic gate with PDC sources and show the effect\nof distinguishing information on the performance of the gate.",
    "arxiv_id": "quant-ph/0305192",
    "authors": [
      "A. B. U\u0027Ren",
      "K. Banaszek",
      "I. A. Walmsley"
    ],
    "categories": [
      "quant-ph"
    ],
    "journal_ref": "Quantum Information and Computation 3, 480 (2003)",
    "title": "Photon engineering for quantum information processing",
    "url": "https://arxiv.org/abs/quant-ph/0305192"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "75218eac-0f27-4874-99b5-fd6aeeb4909b",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}