{
  "annotation_id": "91ceb112-6351-45a2-85c8-ebac58e5379c",
  "date_created": "2026-03-02T18:02:34.040000Z",
  "date_modified": "2026-03-02T18:02:34.040000Z",
  "file_hash": "f4896e96702c06f2e2d7f297e7abc3328dc94a5e3f1353dd044cce546b5e5fad",
  "private": false,
  "record": {
    "abstract": "Lorentz transformation of the reduced helicity density matrix for a massive\nspin 1/2 particle is investigated in the framework of relativistic quantum\ninformation theory for the first time. The corresponding helicity entropy is\ncalculated, which shows no invariant meaning as that of spin. The variation of\nthe helicity entropy with the relative speed of motion of inertial observers,\nhowever, differs significantly from that of spin due to their distinct\ntransformation behaviors under the action of Lorentz group. This novel and odd\nbehavior unique to the helicity may be readily detected by high energy physics\nexperiments. The underlying physical explanations are also discussed.",
    "arxiv_id": "quant-ph/0701233",
    "authors": [
      "Song He",
      "Shuxin Shao",
      "Hongbao Zhang"
    ],
    "categories": [
      "quant-ph",
      "hep-th"
    ],
    "doi": "10.1088/1751-8113/40/36/F02",
    "journal_ref": "J.Phys.A40:F857-F862,2007",
    "title": "Quantum Helicity Entropy of Moving Bodies",
    "url": "https://arxiv.org/abs/quant-ph/0701233"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "bd02e4fd-1b4e-49e3-a3f8-d9f074189cc0",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}