{
  "annotation_id": "fc66623c-8e6f-4da1-8af8-e075c4d468a9",
  "date_created": "2026-03-02T18:01:38.906000Z",
  "date_modified": "2026-03-02T18:01:38.906000Z",
  "file_hash": "4d84875e948585510f286039bb9b715f95add9f9e2146b3697c6e2a7cd73e5b5",
  "private": false,
  "record": {
    "abstract": "A general relation between the Moyal formalisms for a spin and a particle is\nestablished. Once the formalism has been set up for a spin, the phase-space\ndescription of a particle is obtained from the `contraction\u0027 of the group of\nrotations to the group of translations. This is shown by explicitly contracting\na spin Wigner-kernel to the Wigner kernel of a particle. In fact, only one out\nof 2^{2s} different possible kernels for a spin shows this behaviour.",
    "arxiv_id": "quant-ph/0004060",
    "authors": [
      "Jean-Pierre Amiet",
      "Stefan Weigert"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.63.012102",
    "journal_ref": "Phys. Rev. A 63 (2001) 012102",
    "title": "Contracting the Wigner-Kernel of a Spin to the Wigner-Kernel of a   Particle",
    "url": "https://arxiv.org/abs/quant-ph/0004060"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "edc7322c-6e96-45c1-aa17-728ded7e1660",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}