{
  "annotation_id": "97e21a9d-586a-4c40-85c0-e91620680c28",
  "date_created": "2026-03-02T18:02:10.006000Z",
  "date_modified": "2026-03-02T18:02:10.006000Z",
  "file_hash": "97ad293c0887f3894d696176e8322ee2ce53b631d911d6281c186b30b7309360",
  "private": false,
  "record": {
    "abstract": "Using results from quantum filtering theory and methods from classical\ncontrol theory, we derive an optimal control strategy for an open two-level\nsystem (a qubit in interaction with the electromagnetic field) controlled by a\nlaser. The aim is to optimally choose the laser\u0027s amplitude and phase in order\nto drive the system into a desired state. The Bellman equations are obtained\nfor the case of diffusive and counting measurements for vacuum field states. A\nfull exact solution of the optimal control problem is given for a system with\nsimpler, linear, dynamics. These linear dynamics can be obtained physically by\nconsidering a two-level atom in a strongly driven, heavily damped, optical\ncavity.",
    "arxiv_id": "quant-ph/0407192",
    "authors": [
      "Luc Bouten",
      "Simon Edwards",
      "V P Belavkin"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1088/0953-4075/38/3/002",
    "journal_ref": "J. Phys. B: At. Mol. Opt. Phys. 38 (2005) 151-160",
    "title": "Bellman equations for optimal feedback control of qubit states",
    "url": "https://arxiv.org/abs/quant-ph/0407192"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "6a380e70-9c6d-4065-b6e9-e8d7a30780a9",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}