{
  "annotation_id": "a87bd9ab-481f-42c6-bcb3-94dbaf3e299a",
  "date_created": "2026-03-02T18:02:23.792000Z",
  "date_modified": "2026-03-02T18:02:23.792000Z",
  "file_hash": "736471c92e500725db8c35863f27f4679bf1b7f068d1b04b843e40c077749c41",
  "private": false,
  "record": {
    "abstract": "We study the quantum entanglement produced by a head-on collision between two\ngaussian wave packets in three-dimensional space. By deriving the two-particle\nwave function modified by s-wave scattering amplitudes, we obtain an\napproximate analytic expression of the purity of an individual particle. The\nloss of purity provides an indicator of the degree of entanglement. In the case\nthe wave packets are narrow in momentum space, we show that the loss of purity\nis solely controlled by the ratio of the scattering cross section to the\ntransverse area of the wave packets.",
    "arxiv_id": "quant-ph/0601041",
    "authors": [
      "Jia Wang",
      "C. K. Law",
      "M. -C. Chu"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.73.034302",
    "title": "Loss of purity by wave packet scattering at low energies",
    "url": "https://arxiv.org/abs/quant-ph/0601041"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "534b3ae9-8fbd-4c4e-b2cb-1b0a814f2c88",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}