{
  "id": "1101.4612",
  "version": "v4",
  "published": "2011-01-24T18:20:03.000Z",
  "updated": "2012-07-08T03:20:17.000Z",
  "title": "A No-summoning theorem in Relativistic Quantum Theory",
  "authors": [
    "Adrian Kent"
  ],
  "comment": "Tiny typos corrected. Titles added to some references. To appear in Quantum Information Processing",
  "journal": "Quantum Information Processing 12 (2) pp 1023-1032 (2013)",
  "doi": "10.1007/s11128-012-0431-6",
  "categories": [
    "quant-ph",
    "gr-qc",
    "hep-th"
  ],
  "abstract": "Alice gives Bob an unknown localized physical state at some point P. At some point Q in the causal future of P, Alice will ask Bob for the state back. Bob knows this, but does not know at which point Q until the request is made. Bob can satisfy Alice's summons, with arbitrarily short delay, for a quantum state in Galilean space-time or a classical state in Minkowski space-time. However, given an unknown quantum state in Minkowski space-time, he cannot generally fulfil her summons. This {\\it no-summoning theorem} is a fundamental feature of, and intrinsic to, relativistic quantum theory. It follows from the no-signalling principle and the no-cloning theorem, but not from either alone.",
  "revisions": [
    {
      "version": "v4",
      "updated": "2012-07-08T03:20:17.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "relativistic quantum theory",
      "no-summoning theorem",
      "minkowski space-time",
      "satisfy alices summons",
      "unknown quantum state"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 895880,
      "adsabs": "2011arXiv1101.4612K"
    }
  }
}