{
  "annotation_id": "d02a3da9-cf18-4663-b165-1362d58cb1c7",
  "date_created": "2026-03-02T18:01:56.566000Z",
  "date_modified": "2026-03-02T18:01:56.566000Z",
  "file_hash": "fd8293e77da6d4f7160e0679cbbfa0f7df0f131f9e1ca21fd2daee099dc15a89",
  "private": false,
  "record": {
    "abstract": "A localized free particle is represented by a wave packet and its motion is\ndiscussed in most quantum mechanics textbooks. Implicit in these discussions is\nthe assumption of zero temperature. We discuss how the effects of finite\ntemperature and squeezing can be incorporated in an elementary manner. The\nresults show how the introduction of simple tools and ideas can bring the\nreader into contact with topics at the frontiers of research in quantum\nmechanics. We discuss the standard quantum limit, which is of interest in the\nmeasurement of small forces, and decoherence of a mixed (``Schrodinger cat\u0027\u0027)\nstate, which has implications for current research in quantum computation,\nentanglement, and the quantum-classical interface.",
    "arxiv_id": "quant-ph/0301057",
    "authors": [
      "G. W. Ford",
      "R. F. O\u0027Connell"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1119/1.1447540",
    "journal_ref": "Am.J.Phys. 70, 319(2002)",
    "title": "Wave Packet Spreading: Temperature and Squeezing Effects with   Applications to Quantum Measurement and Decoherence",
    "url": "https://arxiv.org/abs/quant-ph/0301057"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "29d2df7c-9546-489d-9195-0e44600f4ee4",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}