{
  "annotation_id": "b87f8645-b749-44ca-b365-17a21651df49",
  "date_created": "2026-03-02T18:02:30.419000Z",
  "date_modified": "2026-03-02T18:02:30.419000Z",
  "file_hash": "982134f385e997b3821ca3f587b1208e4f74c8054099ac491f4b281d1d4f7058",
  "private": false,
  "record": {
    "abstract": "Pure states are fundamental for the implementation of quantum technologies,\nand several methods for the purification of the state of a quantum system S\nhave been developed in the past years. In this letter we present a new\napproach, based on the interaction of S with an auxiliary system P, having a\nwide range of applicability. Considering two-level systems S and P and assuming\na particular interaction between them, we prove that complete purifications can\nbe obtained under suitable conditions on the parameters characterizing P. Using\nanalytical and numerical tools, we show that the purification process exhibits\na resonant behavior in both the cases of system isolated from the external\nenvironment or not.",
    "arxiv_id": "quant-ph/0609141",
    "authors": [
      "Raffaele Romano"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.75.024301",
    "journal_ref": "Phys. Rev. A 75, 024301 (2007)",
    "title": "Resonant purification of mixed states for closed and open quantum   systems",
    "url": "https://arxiv.org/abs/quant-ph/0609141"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "3aef16e8-676b-4bb0-b509-99a12e2e02d2",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}