{
  "id": "2012.05785",
  "version": "v2",
  "published": "2020-12-10T16:21:38.000Z",
  "updated": "2021-09-13T01:58:59.000Z",
  "title": "Readout of Majorana bound states via Landau-Zener transition",
  "authors": [
    "Zhen-Tao Zhang",
    "Dong E. Liu"
  ],
  "comment": "7 pages, 5 figures",
  "journal": "Phys. Rev. B 103, 195401 (2021)",
  "doi": "10.1103/PhysRevB.103.195401",
  "categories": [
    "cond-mat.mes-hall",
    "quant-ph"
  ],
  "abstract": "Reading out Majorana bound states (MBSs) is essential both to verify their non-Abelian property and to realize topological quantum computation. Here, we construct a protocol to measure the parity of two MBSs in a Majorana island coupled to double quantum dot (DQD). The parity information is mapped to the charge state of the DQD through Landau-Zener transition. The operation needed is sweeping the bias of the DQD, which is followed by charge sensing. In the case without fine-tuning, a single run of sweep-and-detection implement a weak measurement of the parity. We find that in general a sequence of about ten runs would completely project a superposition state to either parity, and the charge detection in each run records how the state of MBSs collapses step by step. Remarkably, this readout protocol is of non-demolition and robust to low frequency charge fluctuation.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2021-09-13T01:58:59.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "majorana bound states",
      "landau-zener transition",
      "low frequency charge fluctuation",
      "mbss collapses step",
      "weak measurement"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. B"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 7,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}