{
  "annotation_id": "5dbde005-2956-4251-bada-31b2a3737984",
  "date_created": "2026-03-02T18:02:19.483000Z",
  "date_modified": "2026-03-02T18:02:19.483000Z",
  "file_hash": "4d88968565625ca25463202fa73bbb08cd88e251b0187100c7916a8006eb378d",
  "private": false,
  "record": {
    "abstract": "We consider a two-dimensional quantum control system evolving under an\nentropy-increasing irreversible dynamics in the semigroup form. Considering a\nphenomenological approach to the dynamics, we show that the accessibility\nproperty of the system depends on whether its evolution is assumed to be\npositive or completely positive. In particular, we characterize the family of\nmaps having different accessibility and show the impact of that property on\nobservable quantities by means of a simple physical model.",
    "arxiv_id": "quant-ph/0509041",
    "authors": [
      "Raffaele Romano"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1088/0305-4470/38/41/018",
    "journal_ref": "J. Phys. A: Math. Gen. 38 (2005) 9105-9114",
    "title": "Impact of positivity and complete positivity on accessibility of   Markovian dynamics",
    "url": "https://arxiv.org/abs/quant-ph/0509041"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "27cca399-b09d-42e8-8ac8-7e140aac65f2",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}