{
  "annotation_id": "4d26d2c5-9a96-478d-9b48-0e59dce21040",
  "date_created": "2026-03-02T18:01:59.605000Z",
  "date_modified": "2026-03-02T18:01:59.605000Z",
  "file_hash": "71c624170a5d284cadff751a30b84d9290e708e3de55858c94172315dc7d0832",
  "private": false,
  "record": {
    "abstract": "We analyze the effects of the environment on the spin tunneling process of\nparamagnetic and superparamagnetic particles and conclude that the non assisted\nmacroscopic tunneling rate is hardly affected in such case, but other more\neffective (phonon mediated) processes change the magnetization state of the\nparticle. We conclude that for both, paramagnetic and superparamagnetic\nparticles, the decoherence time scale is extremely short (~ 10^(-8..-16)seg),\nindicating thar coherent tunneling should be strongly suppressed in favor of\nincoherent tunneling, i.e., the population of higher levels with subsequent\ndecay.",
    "arxiv_id": "quant-ph/0304185",
    "authors": [
      "E. H. Martins Ferreira",
      "M. C. Nemes",
      "H. -D. Pfannes"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "Decoherence effects on the tunneling rate of paramagnetic and   superparamagnetic particles",
    "url": "https://arxiv.org/abs/quant-ph/0304185"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "2c0085ff-1662-4340-8f5e-5c02077d5188",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}