{
  "annotation_id": "83529c02-36d4-4fcd-80f7-abdb1f858f5b",
  "date_created": "2026-03-02T18:02:23.615000Z",
  "date_modified": "2026-03-02T18:02:23.615000Z",
  "file_hash": "9ca9369188281fff8cb80fcff3ada32e2b136e53d70aff595834e1b4eb828854",
  "private": false,
  "record": {
    "abstract": "The dynamics of a spin-1/2 particle coupled to a nuclear spin bath through an\nisotropic Heisenberg interaction is studied, as a model for the spin\ndecoherence in quantum dots. The time-dependent polarization of the central\nspin is calculated as a function of the bath-spin distribution and the\npolarizations of the initial bath state. For short times, the polarization of\nthe central spin shows a gaussian decay, and at later times it revives\ndisplaying nonmonotonic time dependence. The decoherence time scale dep ends on\nmoments of the bath-spin distribuition, and also on the polarization strengths\nin various bath-spin channels. The bath polarizations have a tendency to\nincrease the decoherence time scale. The effective dynamics of the central spin\npolarization is shown to be describ ed by a master equation with non-markovian\nfeatures.",
    "arxiv_id": "quant-ph/0602027",
    "authors": [
      "D. D. Bhaktavatsala Rao",
      "V. Ravishankar",
      "V. Subrahmanyam"
    ],
    "categories": [
      "quant-ph",
      "cond-mat.mes-hall"
    ],
    "doi": "10.1103/PhysRevA.74.022301",
    "journal_ref": "Phys. Rev. A 74, 022301 (2006)",
    "title": "Spin Decoherence from Hamiltonian dynamics in Quantum Dots",
    "url": "https://arxiv.org/abs/quant-ph/0602027"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "c82744ce-9052-4546-9a04-9560cc572fb4",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}