{
  "annotation_id": "11d75a28-cf88-4c0e-bf4f-24281e1b870d",
  "date_created": "2026-03-02T18:02:17.263000Z",
  "date_modified": "2026-03-02T18:02:17.263000Z",
  "file_hash": "acadf0ff728849054d4993c7980e7bedb9d989b1540efae9152df70f2b011f66",
  "private": false,
  "record": {
    "abstract": "We show that a dynamical spacetime generates entanglement between modes of a\nquantum field. Conversely, the entanglement encodes information concerning the\nunderlying spacetime structure, which hints at the prospect of applications of\nthis observation to cosmology. Here we illustrate this point by way of an\nanalytically exactly soluble example, that of a scalar quantum field on a\ntwo-dimensional asymptotically flat Robertson-Walker expanding spacetime. We\nexplicitly calculate the entanglement in the far future, for a quantum field\nresiding in the vacuum state in the distant past. In this toy universe, it is\npossible to fully reconstruct the parameters of the cosmic history from the\nentanglement entropy.",
    "arxiv_id": "quant-ph/0506113",
    "authors": [
      "J. L. Ball",
      "I. Fuentes-Schuller",
      "F. P. Schuller"
    ],
    "categories": [
      "quant-ph",
      "gr-qc",
      "hep-th"
    ],
    "doi": "10.1016/j.physleta.2006.07.028",
    "journal_ref": "Phys.Lett. A359 (2006) 550-554",
    "title": "Entanglement in an expanding spacetime",
    "url": "https://arxiv.org/abs/quant-ph/0506113"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "40f73812-a2b5-4051-a105-98b6aa7eed97",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}