{
  "annotation_id": "0196dfc9-8df2-4a82-81f8-35557db5f69e",
  "date_created": "2026-03-02T18:02:37.832000Z",
  "date_modified": "2026-03-02T18:02:37.832000Z",
  "file_hash": "77a6b6d30dd96032026ec26b7c6726ced1dc2d797b872d3064c5fd073323346c",
  "private": false,
  "record": {
    "abstract": "Quantum physics involves an ensemble of quantum systems, usually one thinks\nof a large ensemble of identical quantum systems at one single time. In single\nion experiments one has a single quantum system at an ensemble of different\ntimes. This provides the means of demonstrating the beginning of time of a\nsemigroup evolution for a decaying state.",
    "arxiv_id": "quant-ph/0703163",
    "authors": [
      "A. Bohm",
      "H. Kaldass",
      "S. Komy",
      "W. P. Schleich"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "Time Asymmetry in Quantum Physics - II. Experimental Demonstration Using   a Single Ion",
    "url": "https://arxiv.org/abs/quant-ph/0703163"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "b337dfe0-b464-4ae9-9def-30ea28ffd61b",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}