{
  "annotation_id": "a57b5ddb-8004-4e92-94cc-7072572122e9",
  "date_created": "2026-03-02T18:02:45.134000Z",
  "date_modified": "2026-03-02T18:02:45.134000Z",
  "file_hash": "c760f96c22c3e9e7acde00bfd566bf0c7a00fa405f7efa35ecb6f4f7da21e769",
  "private": false,
  "record": {
    "abstract": "We introduce quantum procedures for making $\\cal G$-invariant the dynamics of\nan arbitrary quantum system S, where $\\cal G$ is a finite group acting on the\nspace state of S. Several applications of this idea are discussed. In\nparticular when S is a N-qubit quantum computer interacting with its\nenvironment and $\\cal G$ the symmetric group of qubit permutations, the\nresulting effective dynamics admits noiseless subspaces. Moreover it is shown\nthat the recently introduced iterated-pulses schemes for reducing decoherence\nin quantum computers fit in this general framework. The noise-inducing\ncomponent of the Hamiltonian is filtered out by the symmetrization procedure\njust due to its transformation properties.",
    "arxiv_id": "quant-ph/9809064",
    "authors": [
      "Paolo Zanardi"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1016/S0375-9601(99)00365-5",
    "journal_ref": "Phys.Lett. A258 (1999) 77",
    "title": "Symmetrizing Evolutions",
    "url": "https://arxiv.org/abs/quant-ph/9809064"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "146da942-1a18-43d5-974b-ad79543b9e1e",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}