{
  "annotation_id": "d366d27d-16bf-4527-bffc-3b63b5534f87",
  "date_created": "2026-03-02T18:02:09.663000Z",
  "date_modified": "2026-03-02T18:02:09.663000Z",
  "file_hash": "f8edda5cf8e12bce32f7f021d781843b40c71bd1067515248885524c0aacf9ec",
  "private": false,
  "record": {
    "abstract": "We present a split-beam neutron interferometric experiment to test the\nnon-cyclic geometric phase tied to the spatial evolution of the system: the\nsubjacent two-dimensional Hilbert space is spanned by the two possible paths in\nthe interferometer and the evolution of the state is controlled by phase\nshifters and absorbers. A related experiment was reported previously by some of\nthe authors [Hasegawa et al., PRA 53, 2486 (1996)] to verify the cyclic spatial\ngeometric phase. The interpretation of this experiment, namely to ascribe a\ngeometric phase to this particular state evolution, has met severe criticism\n[Wagh, PRA 59, 1715 (1999)]. The extension to non-cyclic evolution manifests\nthe correctness of the interpretation of the previous experiment by means of an\nexplicit calculation of the non-cyclic geometric phase in terms of paths on the\nBloch-sphere. The theoretical treatment comprises the cyclic geometric phase as\na special case, which is confirmed by experiment.",
    "arxiv_id": "quant-ph/0408144",
    "authors": [
      "Stefan Filipp",
      "Yuji Hasegawa",
      "Rudolf Loidl",
      "Helmut Rauch"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "Spatial non-cyclic geometric phase in neutron interferometry",
    "url": "https://arxiv.org/abs/quant-ph/0408144"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "4b56d48c-8eca-4f1b-ad01-87216c1a6dd2",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}