{
  "annotation_id": "1382bac1-e3c9-4d16-b404-d4a6d113a5cc",
  "date_created": "2026-03-02T18:01:56.329000Z",
  "date_modified": "2026-03-02T18:01:56.329000Z",
  "file_hash": "b16c85717f1a89a4b2b8140a4e3529c557f1f75f66ec8df7f44165e6c5f9b529",
  "private": false,
  "record": {
    "abstract": "We unify the quantum Zeno effect (QZE) and the \"bang-bang\" (BB) decoupling\nmethod for suppressing decoherence in open quantum systems: in both cases\nstrong coupling to an external system or apparatus induces a dynamical\nsuperselection rule that partitions the open system\u0027s Hilbert space into\nquantum Zeno subspaces. Our unification makes use of von Neumann\u0027s ergodic\ntheorem and avoids making any of the symmetry assumptions usually made in\ndiscussions of BB. Thus we are able to generalize BB to arbitrary fast and\nstrong pulse sequences, requiring no symmetry, and to show the existence of two\nalternatives to pulsed BB: continuous decoupling, and pulsed measurements. Our\nunified treatment enables us to derive limits on the efficacy of the BB method:\nwe explicitly show that the inverse QZE implies that BB can in some cases\naccelerate, rather than inhibit, decoherence.",
    "arxiv_id": "quant-ph/0303132",
    "authors": [
      "P. Facchi",
      "D. A. Lidar",
      "S. Pascazio"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.69.032314",
    "journal_ref": "Phys. Rev. A 69 (2004) 032314",
    "title": "Unification of Dynamical Decoupling and the Quantum Zeno Effect",
    "url": "https://arxiv.org/abs/quant-ph/0303132"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "d1628788-c4d1-468b-9257-39e78e77aee1",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}