{
  "annotation_id": "40e93f42-156a-40b1-9308-8ecd22dc639c",
  "date_created": "2026-03-02T18:01:42.356000Z",
  "date_modified": "2026-03-02T18:01:42.356000Z",
  "file_hash": "8ddc0d3741f287185bcf708ac0e35c9534bf829254aaed9c6e70d69edc0938e5",
  "private": false,
  "record": {
    "abstract": "We present theoretical and experimental study of preparing maximally\nentangled two-photon polarization states, or Bell states, using femtosecond\npulse pumped spontaneous parametric down-conversion (SPDC). First, we show how\nthe inherent distinguishability in femtosecond pulse pumped type-II SPDC can be\nremoved by using an interferometric technique without spectral and amplitude\npost-selection. We then analyze the recently introduced Bell state preparation\nscheme using type-I SPDC. Theoretically, both methods offer the same results,\nhowever, type-I SPDC provides experimentally superior methods of preparing Bell\nstates in femtosecond pulse pumped SPDC. Such a pulsed source of highly\nentangled photon pairs is useful in quantum communications, quantum\ncryptography, quantum teleportation, etc.",
    "arxiv_id": "quant-ph/0103168",
    "authors": [
      "Yoon-Ho Kim",
      "Maria V. Chekhova",
      "Sergei P. Kulik",
      "Morton H. Rubin",
      "Yanhua Shih"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.63.062301",
    "journal_ref": "PRA 63, 062301 (2001)",
    "title": "Interferometric Bell-state preparation using femtosecond-pulse-pumped   Spontaneous Parametric Down-Conversion",
    "url": "https://arxiv.org/abs/quant-ph/0103168"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "a1ff7876-3b49-4172-8146-5cb0fd94cc70",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}