{
  "annotation_id": "5231d3c0-f117-4a5b-bf62-5c345f5f8fcb",
  "date_created": "2026-03-02T18:01:52.480000Z",
  "date_modified": "2026-03-02T18:01:52.480000Z",
  "file_hash": "eccfe1453f707ab6091318f52d28b5c0cd2ba3ce8394e98c34d62d857679e3e0",
  "private": false,
  "record": {
    "abstract": "Simultaneity is a well-defined notion in special relativity once a Minkowski\nmetric structure is fixed on the spacetime continuum (manifold) of events. In\nquantum gravity, however, the metric is not expected to be a fixed, classical\nstructure, but a fluctuating quantum operator which may assume a coherent\nsuperposition of two classically-distinguishable values. A natural question to\nask is what happens to the notion of simultaneity and synchronization when the\nmetric is in a quantum superposition. Here we show that the resource of\ndistributed entanglement of the same kind as used by Jozsa et al. [Phys. Rev.\nLett. 85, 2010 (2000)] gives rise to an experimental probe that is sensitive to\ncoherent quantum fluctuations in the spacetime metric.",
    "arxiv_id": "quant-ph/0206082",
    "authors": [
      "Pieter Kok",
      "Ulvi Yurtsever",
      "Samuel L. Braunstein",
      "Jonathan P. Dowling"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "Distributed entanglement as a probe for the quantum structure of   spacetime",
    "url": "https://arxiv.org/abs/quant-ph/0206082"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "51ca81c2-3dc7-4cd0-ab36-07f4969c2904",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}