{
  "annotation_id": "9d99938d-6eca-483e-a7c8-257f32648e8f",
  "date_created": "2026-03-02T18:02:09.451000Z",
  "date_modified": "2026-03-02T18:02:09.451000Z",
  "file_hash": "2dc6e02cf597cbb8afb4f3ecd7d691972eabd67aaa87265b7694ed1fc4f0f2d0",
  "private": false,
  "record": {
    "abstract": "Fundamental limits on the controllability of quantum mechanical systems are\ndiscussed in the light of quantum information theory. It is shown that the\namount of entropy-reduction that can be extracted from a quantum system by\nfeedback controller is upper bounded by a sum of the decrease of entropy\nachievable in open-loop control and the mutual information between the quantum\nsystem and the controller. This upper bound sets a fundamental limit on the\nperformance of any quantum controllers whose designs are based on the\npossibilities to attain low entropy states. An application of this approach\npertaining to quantum error correction is also discussed.",
    "arxiv_id": "quant-ph/0409187",
    "authors": [
      "Shiro Kawabata"
    ],
    "categories": [
      "quant-ph",
      "cond-mat.stat-mech",
      "math-ph",
      "math.MP"
    ],
    "doi": "10.1103/PhysRevA.68.064302",
    "journal_ref": "Phys. Rev. A 68 (2003) 064302",
    "title": "Information Theoretical Approach to Control of Quantum Mechanical   Systems",
    "url": "https://arxiv.org/abs/quant-ph/0409187"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "a77fbae7-ed09-4cc5-9b5f-e3e0ce75b3f6",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}