{
  "id": "quant-ph/0003123",
  "version": "v2",
  "published": "2000-03-27T22:32:32.000Z",
  "updated": "2000-05-03T01:31:36.000Z",
  "title": "Fidelity balance in quantum operations",
  "authors": [
    "Konrad Banaszek"
  ],
  "comment": "4 pages, REVTeX. Revised version",
  "journal": "Phys. Rev. Lett. 86, 1366 (2001)",
  "doi": "10.1103/PhysRevLett.86.1366",
  "categories": [
    "quant-ph"
  ],
  "abstract": "I derive a tight bound between the quality of estimating the state of a single copy of a $d$-level system, and the degree the initial state has to be altered in course of this procedure. This result provides a complete analytical description of the quantum mechanical trade-off between the information gain and the quantum state disturbance expressed in terms of mean fidelities. I also discuss consequences of this bound for quantum teleportation using nonmaximally entangled states.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2000-05-03T01:31:36.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "quantum operations",
      "fidelity balance",
      "single copy",
      "level system",
      "tight bound"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. Lett."
    },
    "note": {
      "typesetting": "RevTeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}