{
  "annotation_id": "d2e6b804-9a67-4816-ac6c-3829654be4fd",
  "date_created": "2026-03-02T18:02:00.216000Z",
  "date_modified": "2026-03-02T18:02:00.216000Z",
  "file_hash": "56d89d84abeee614c3ad53b07686f452cee1e90ba8a8b1d021a3c03083b5d6cb",
  "private": false,
  "record": {
    "abstract": "We consider the problem of determining the state of a quantum system given\none or more readings of the expectation value of an observable. The system is\nassumed to be a finite dimensional quantum control system for which we can\ninfluence the dynamics by generating all the unitary evolutions in a Lie group.\nWe investigate to what extent, by an appropriate sequence of evolutions and\nmeasurements, we can obtain information on the initial state of the system. We\npresent a system theoretic viewpoint of this problem in that we study the {\\it\nobservability} of the system. In this context, we characterize the equivalence\nclasses of indistinguishable states and propose algorithms for state\nidentification.",
    "arxiv_id": "quant-ph/0307127",
    "authors": [
      "Domenico D\u0027Alessandro"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1088/0305-4470/36/37/310",
    "title": "On Quantum State Observability and Measurement",
    "url": "https://arxiv.org/abs/quant-ph/0307127"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "e70aa791-d214-4b3a-a23d-719ada5e80ba",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}