{
  "annotation_id": "6621cd2d-1461-4e96-9b93-597df9713127",
  "date_created": "2026-03-02T18:01:59.971000Z",
  "date_modified": "2026-03-02T18:01:59.971000Z",
  "file_hash": "b965b39d74c82cf1ab98e7bbb5cd63829cb915373b0bd935f8287d2b5702d90c",
  "private": false,
  "record": {
    "abstract": "In a recent article, Ford, Lewis and O\u0027Connell (PRA 64, 032101 (2001))\ndiscuss a thought experiment in which a Brownian particle is subjected to a\ndouble-slit measurement. Analyzing the decay of the emerging interference\npattern, they derive a decoherence rate that is much faster than previous\nresults and even persists in the limit of vanishing dissipation. This result is\nbased on the definition of a certain attenuation factor, which they analyze for\nshort times. In this note, we point out that this attenuation factor captures\nthe physics of decoherence only for times larger than a certain time t_mix,\nwhich is the time it takes until the two emerging wave packets begin to\noverlap. Therefore, the strategy of Ford et al of extracting the decoherence\ntime from the regime t \u003c t_mix is in our opinion not meaningful. If one\nanalyzes the attenuation factor for t \u003e t_mix, one recovers familiar behaviour\nfor the decoherence time; in particular, no decoherence is seen in the absence\nof dissipation. The latter conclusion is confirmed with a simple calculation of\nthe off-diagonal elements of the reduced density matrix.",
    "arxiv_id": "quant-ph/0306019",
    "authors": [
      "Dominique Gobert",
      "Jan von Delft",
      "Vinay Ambegaokar"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.70.026101",
    "title": "Decoherence without dissipation?",
    "url": "https://arxiv.org/abs/quant-ph/0306019"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "341436ed-1b1c-487d-9bda-bf6d47ce4f36",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}