{
  "id": "2004.04255",
  "version": "v1",
  "published": "2020-04-08T21:07:12.000Z",
  "updated": "2020-04-08T21:07:12.000Z",
  "title": "Qubit transformations on Rashba ring with periodic potential",
  "authors": [
    "Kregar Ambrož",
    "Ramšak Anton"
  ],
  "comment": "submitted to New Journal of Physics",
  "categories": [
    "cond-mat.mes-hall",
    "quant-ph"
  ],
  "abstract": "A spin-qubit transformation protocol is proposed for an electron in a mesoscopic quantum ring with tunable Rashba interaction controlled by the external electric field. The dynamics of an electron driven around the ring by a series of Landau-Zenner-like transitions between a finite number of local voltage gates is determined analytically. General single-qubit transformations are demonstrated to be feasible in a dynamical basis of localized pseudo-spin states. It is also demonstrated that by the use of suitable protocols based on changes of the Rashba interaction full Bloch sphere can be covered. The challenges of a possible realization of the proposed system in semiconductor heterostructures are discussed.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2020-04-08T21:07:12.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "periodic potential",
      "rashba ring",
      "rashba interaction full bloch sphere",
      "external electric field",
      "spin-qubit transformation protocol"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}