{
  "annotation_id": "70a965b5-f6b3-4a0d-a3db-9a1a68b0e8f7",
  "date_created": "2026-03-02T18:01:59.601000Z",
  "date_modified": "2026-03-02T18:01:59.601000Z",
  "file_hash": "27825ee5c5950e3df8a63a4aa38bd831df255be1540f4f96eeeead4382da71bc",
  "private": false,
  "record": {
    "abstract": "The propagation of monomode photons inside a coiled optical fibre was\nregarded as a time-dependent quantum evolution process, which gives rise to a\ngeometric phase. It is well known that the investigation of non-adiabatic\ngeometric phases ought to be performed only in the Schr\\\"{o}dinger picture. So,\nthe projections of photon spin operators onto the fixed frame of reference is\ndiscussed in this paper. In addition, we also treat the non-normal-order spin\noperators and consider the potential effects (e.g., quantum-vacuum geometric\nphases) of quantum fluctuation fields arising in a curved optical fibre. The\nquantum-vacuum geometric phase, which is of physical interest, can be deducted\nby using the operator normal product, and the doubt of validity and\nuniversality for the normal-normal procedure applied to time-dependent quantum\nsystems is thus proposed. In the Appendix, the discussion of possible\nexperimental realizations of quantum-vacuum geometric phases is briefly\npresented.",
    "arxiv_id": "quant-ph/0304172",
    "authors": [
      "Jian-Qi Shen"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "Monomode photon spin operators projected onto the fixed frame and   quantum-vacuum geometric phases of photons inside a noncoplanar optical fibre",
    "url": "https://arxiv.org/abs/quant-ph/0304172"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "ae1b68bb-68f5-4c62-9b5b-14cb548fc8af",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}