{
  "annotation_id": "470b8f0c-29c7-4323-b281-a92b5e3f18fb",
  "date_created": "2026-03-02T18:02:41.170000Z",
  "date_modified": "2026-03-02T18:02:41.170000Z",
  "file_hash": "854f4bbd6213e2e0e3cf26b2fbc6a256401c5cd34fd022a3aa2963d39f4df04a",
  "private": false,
  "record": {
    "abstract": "A model for a quantum register $\\cal R$ made of $N$ replicas of a\n$d$-dimensional quantum system (cell) coupled with the environment, is studied\nby means of a Born-Markov Master Equation (ME). Dissipation and decoherence are\ndiscussed in various cases in which a sub-decoherent enconding can be\nrigorously found. For the qubit case ($d=2$) we have solved, for small $N,$ the\nME by numerical direct integration and studied, as a function of the coherence\nlength $\\xi_c$ of the bath, fidelity and decoherence rates of states of the\nregister. For large enough $\\xi_c$ the singlet states of the global $su(2)$\npseudo-spin algebra of the register (noiseless at $\\xi_c=\\infty$) are shown to\nhave a much smaller decoherence rates than the rest of the Hilbert space.",
    "arxiv_id": "quant-ph/9705045",
    "authors": [
      "Paolo Zanardi"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.57.3276",
    "journal_ref": "Phys.Rev.A57:3276,1998",
    "title": "Dissipation and Decoherence in a Quantum Register",
    "url": "https://arxiv.org/abs/quant-ph/9705045"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "0f1955c2-ebd2-4709-b000-af8af286b436",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}