{
  "annotation_id": "6e9812eb-d9ee-4378-9ea7-14c6144c36b2",
  "date_created": "2026-03-02T18:01:56.624000Z",
  "date_modified": "2026-03-02T18:01:56.624000Z",
  "file_hash": "0655415e2efe2e4f4c6ecc9487b04b292b0fd5192ba6e4944b0247b37e51bef6",
  "private": false,
  "record": {
    "abstract": "The long-time evolution of a system in interaction with an external\nenvironment is usually described by a family of linear maps g_t, generated by\nmaster equations of Block-Redfield type. These maps are in general\nnon-positive; a widely adopted cure for this physical inconsistency is to\nrestrict the domain of definition of the dynamical maps to those states for\nwhich g_t remains positive. We show that this prescription has to be modified\nwhen two systems are immersed in the same environment and evolve with the\nfactorized dynamics g_t x g_t starting from an entangled initial state.",
    "arxiv_id": "quant-ph/0303027",
    "authors": [
      "F. Benatti",
      "R. Floreanini",
      "M. Piani"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.67.042110",
    "title": "About non-positive evolutions in open system dynamics",
    "url": "https://arxiv.org/abs/quant-ph/0303027"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "75799fb7-f0e3-4534-8eb3-a063034902f8",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}