{
  "annotation_id": "38515226-ef92-4de2-a560-7102f9dd13de",
  "date_created": "2026-03-02T18:01:59.472000Z",
  "date_modified": "2026-03-02T18:01:59.472000Z",
  "file_hash": "077d9a6089ba67ff21e3a1385bd0033d01ba14fad73753c7c836c651f6e12a12",
  "private": false,
  "record": {
    "abstract": "The mean arrival time of free particles is computed using the quantum\nprobability current. This is uniquely determined in the non-relativistic limit\nof Dirac equation, although the Schroedinger probability current has an\ninherent non-uniqueness. Since the Dirac probability current involves a\nspin-dependent term, an arrival time distribution based on the probability\ncurrent shows an observable spin-dependent effect, even for free particles.\nThis arises essentially from relativistic quantum dynamics, but persists even\nin the non-relativistic regime.",
    "arxiv_id": "quant-ph/0306106",
    "authors": [
      "Md. Manirul Ali",
      "A. S. Majumdar",
      "D. Home",
      "S. Sengupta"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.68.042105",
    "journal_ref": "Phys. Rev. A68, 042105 (2003)",
    "title": "Spin dependent observable effect for free particles using the arrival   time distribution",
    "url": "https://arxiv.org/abs/quant-ph/0306106"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "077e1787-9197-4721-926c-1d14b48d6c75",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}