{
  "annotation_id": "f2c5c395-be2d-4243-bdd8-ea39cc7598c7",
  "date_created": "2026-03-02T18:02:30.967000Z",
  "date_modified": "2026-03-02T18:02:30.967000Z",
  "file_hash": "9df943cafc176da42caf82f9036b80b90aecee1c200185e91fd2ae7de19ba876",
  "private": false,
  "record": {
    "abstract": "We experimentally demonstrate that the entanglement between Gaussian\nentangled states can be increased by non-Gaussian operations. Coherent\nsubtraction of single photons from Gaussian quadrature-entangled light pulses,\ncreated by a non-degenerate parametric amplifier, produces delocalized states\nwith negative Wigner functions and complex structures, more entangled than the\ninitial states in terms of negativity. The experimental results are in very\ngood agreement with the theoretical predictions.",
    "arxiv_id": "quant-ph/0608230",
    "authors": [
      "Alexei Ourjoumtsev",
      "Aurelien Dantan",
      "Rosa Tualle-Brouri",
      "Philippe Grangier"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.98.030502",
    "journal_ref": "Physical review letters 98 (2007) 030502",
    "title": "Increasing entanglement between Gaussian states by coherent photon   subtraction",
    "url": "https://arxiv.org/abs/quant-ph/0608230"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "2794e32e-0f82-48a5-a0b0-c81cfb2ae3d7",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}