{
  "annotation_id": "767e1c0d-3410-4e40-9a56-7259c8cef489",
  "date_created": "2026-03-02T18:02:37.244000Z",
  "date_modified": "2026-03-02T18:02:37.244000Z",
  "file_hash": "d8922a87c56dffd334a1ed8e7abe2f0a5c3fce8501f0b899573044f5865a0472",
  "private": false,
  "record": {
    "abstract": "A discussion of the quantum Zeno effect and paradox is given. The quantum\nZeno paradox claims that a continuously observed system, prepared in a state\nwhich is not an eigenstate of the Hamiltonian operator, never decays. To\nrecover the classical behavior of unstable systems we consider a two-level\nsystem interacting with a Bose field, respectively prepared in the excited\nstate and in the Poincare invariant vacuum state. Using time-dependent\nperturbation theory, we evaluate for a finite time interval the probability of\nspontaneous decay of the two-level system. Using the standard argument to\nobtain the quantum Zeno paradox, we consider N measurements where N goes to\ninfinity and we obtain that the non-decay probability law is a pure\nexponential, therefore recovering the classical behavior.",
    "arxiv_id": "quant-ph/0703167",
    "authors": [
      "R. Kullock",
      "N. F. Svaiter"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "A Continuously Observed Two-level System Interacting with a Vacuum Field",
    "url": "https://arxiv.org/abs/quant-ph/0703167"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "86a5f63c-081c-4508-bd86-0a84a0637984",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}