{
  "annotation_id": "1bf5b021-71e1-4d89-975c-ca06438d20ad",
  "date_created": "2026-03-02T18:02:03.585000Z",
  "date_modified": "2026-03-02T18:02:03.585000Z",
  "file_hash": "cf6f63d958d04ef97f775ce50d10d8b17a5c0930afd94053d2bdcfce0a4cc7d7",
  "private": false,
  "record": {
    "abstract": "It is shown that a linear superposition of two macroscopically\ndistinguishable optical coherent states can be generated using a single photon\nsource and simple all-optical operations. Weak squeezing on a single photon,\nbeam mixing with an auxiliary coherent state, and photon detecting with\nimperfect threshold detectors are enough to generate a coherent state\nsuperposition in a free propagating optical field with a large coherent\namplitude ($\\alpha\u003e2$) and high fidelity ($F\u003e0.99$). In contrast to all\nprevious schemes to generate such a state, our scheme does not need photon\nnumber resolving measurements nor Kerr-type nonlinear interactions.\nFurthermore, it is robust to detection inefficiency and exhibits some\nresilience to photon production inefficiency.",
    "arxiv_id": "quant-ph/0401001",
    "authors": [
      "A. P. Lund",
      "H. Jeong",
      "T. C. Ralph",
      "M. S. Kim"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.70.020101",
    "journal_ref": "Phys. Rev. A 70, 020101(R) (2004)",
    "title": "Conditional Production of Superpositions of Coherent States with   Inefficient Photon Detection",
    "url": "https://arxiv.org/abs/quant-ph/0401001"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "4d0824fd-adfc-4dd1-8acc-1a0f359572af",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}