{
  "id": "2206.10828",
  "version": "v1",
  "published": "2022-06-22T04:03:04.000Z",
  "updated": "2022-06-22T04:03:04.000Z",
  "title": "Experimental Test of Contextuality based on State Discrimination with a Single Qubit",
  "authors": [
    "Qiuxin Zhang",
    "Chenhao Zhu",
    "Yuxin Wang",
    "Liangyu Ding",
    "Tingting Shi",
    "Xiang Zhang",
    "Shuaining Zhang",
    "Wei Zhang"
  ],
  "comment": "5 pages, 3 figures",
  "journal": "Chin. Phys. Lett. 2022, 39 (8): 080301",
  "categories": [
    "quant-ph",
    "physics.atom-ph"
  ],
  "abstract": "Exploring quantum phenomena beyond predictions of any classical model has fundamental importance to understand the boundary of classical and quantum descriptions of nature. As a typical property that a quantum system behaves distinctively from a classical counterpart, contextuality has been studied extensively and verified experimentally in systems composed of at least three levels (qutrit). Here we extend the scope of experimental test of contextuality to a minimal quantum system of only two states (qubit) by implementing the minimum error state discrimination on a single $^{171}$Yb$^+$ ion. We observe a substantial violation of a no-go inequality derived by assuming non-contextuality, and firmly conclude that the measured results of state discrimination cannot be reconciled with any non-contextual description. We also quantify the contextual advantage of state discrimination and the tolerance against quantum noises.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2022-06-22T04:03:04.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "experimental test",
      "single qubit",
      "contextuality",
      "minimum error state discrimination",
      "minimal quantum system"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}