{
  "annotation_id": "232461f1-530f-4049-bead-8a014369d576",
  "date_created": "2026-03-02T18:02:34.238000Z",
  "date_modified": "2026-03-02T18:02:34.238000Z",
  "file_hash": "43ab3f595fd926d5113aa594a05d020b1e5a24fbed7e42430c2862568622168c",
  "private": false,
  "record": {
    "abstract": "Relativistic free-motion time-of-arrival theory for massive spin-1/2\nparticles is systematically developed. Contrary to the nonrelativistic\ntime-of-arrival operator studied thoroughly in previous literatures, the\nrelativistic time-of-arrival operator possesses self-adjoint extensions because\nof the particle-antiparticle symmetry. The nonrelativistic limit of our theory\nis in agreement with the nonrelativistic time-of-arrival theory. By comparing\nthe time-of-arrival operator with the Hamiltonian operator of a free Dirac\nparticle, one can show a duality between position space and momentum space.",
    "arxiv_id": "quant-ph/0701116",
    "authors": [
      "Zhi-Yong Wang",
      "Cai-Dong Xiong"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1088/1751-8113/40/8/014",
    "journal_ref": "J.Phys.A40:1897-1905,2007",
    "title": "Relativistic free-motion time-of-arrival",
    "url": "https://arxiv.org/abs/quant-ph/0701116"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "5a2950e0-efa6-4cfe-ae89-71ba77b5af02",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}