{
  "annotation_id": "850d0af7-d7db-412b-b312-ff20f6607f63",
  "date_created": "2026-03-02T18:01:59.934000Z",
  "date_modified": "2026-03-02T18:01:59.934000Z",
  "file_hash": "68a03139441f5fb2976ff698dc4dcaf23932007b61b7ee5caea5726f3782b281",
  "private": false,
  "record": {
    "abstract": "It is commonly believed that photon polarisation entanglement can only be\nobtained via pair creation within the same source or via postselective\nmeasurements on photons that overlapped within their coherence time inside a\nlinear optics setup. In contrast to this, we show here that polarisation\nentanglement can also be produced by distant single photon sources in free\nspace and without the photons ever having to meet, if the detection of a photon\ndoes not reveal its origin -- the which way information. In the case of two\nsources, the entanglement arises under the condition of two emissions in\ncertain spatial directions and leaves the dipoles in a maximally entangled\nstate.",
    "arxiv_id": "quant-ph/0308095",
    "authors": [
      "Yuan Liang Lim",
      "Almut Beige"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1088/0305-4470/38/1/L02",
    "journal_ref": "J. Phys. A 38, L7 (2005).",
    "title": "Photon polarisation entanglement from distant dipole sources",
    "url": "https://arxiv.org/abs/quant-ph/0308095"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "a4ad4775-c390-4850-944e-d5c7f13b5250",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}