{
  "id": "1902.01571",
  "version": "v1",
  "published": "2019-02-05T07:24:10.000Z",
  "updated": "2019-02-05T07:24:10.000Z",
  "title": "Completely scrambled memory for quantum superposition",
  "authors": [
    "Tetsuya Mukai"
  ],
  "comment": "6 pages, 3 figures, 1 table",
  "journal": "Scientific Reports 9, 1147 (2019)",
  "doi": "10.1038/s41598-018-37772-4",
  "categories": [
    "quant-ph"
  ],
  "abstract": "Although constructing a quantum computation device with multiple qubits is arguably a difficult task, several seconds of coherence time with tens of thousands of quantum particles has been demonstrated with a trapped atomic ensemble. As a practical application, a security-enhanced quantum state memory using atoms has been demonstrated. It was shown that the quantum superposition preserved in an atomic ensemble was scrambled and faithfully descrambled; however, the scrambled phase ambiguity remained at 50 %. To overcome this problem, we propose and demonstrate a scheme that achieves 100 % phase ambiguity without introducing an extra Ramsey interferometer. Moreover, this scheme can be used as a direct application to keep the choice between two values secret without falsification.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2019-02-05T07:24:10.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "quantum superposition",
      "scrambled memory",
      "quantum computation device",
      "security-enhanced quantum state memory",
      "extra ramsey interferometer"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "Nature"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 6,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}