{
  "annotation_id": "557232dd-d868-47da-8c84-6c0df05734fb",
  "date_created": "2026-03-02T18:02:13.224000Z",
  "date_modified": "2026-03-02T18:02:13.224000Z",
  "file_hash": "6a41810e71ef90a5d044432fe40b7d75164a7ad69c93d3cfd2a5f2fb2be8bb23",
  "private": false,
  "record": {
    "abstract": "In this article, we give a complete characterization of all the unitary\ntransformations that can be synthesized in a given time for a system of coupled\nspin-1/2 in presence of general time varying coupling tensor. Our treatment is\nquite general and our results help to characterize the reachable set at all\ntimes for a class of bilinear control systems with time varying drift and\nunbounded control amplitude. These results are of fundamental interest in\ngeometric control theory and have applications to control of coupled spins in\nsolid state NMR spectroscopy.",
    "arxiv_id": "quant-ph/0502173",
    "authors": [
      "Haidong Yuan",
      "Navin Khaneja"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.72.040301",
    "journal_ref": "PhysRevA.72.040301,2005.",
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "title": "Time Optimal Control of Coupled Qubits Under Non-Stationary Interactions",
    "url": "https://arxiv.org/abs/quant-ph/0502173"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "f017e4cd-e724-4a69-bfc3-19ffb297fac3",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}