{
  "id": "1707.05217",
  "version": "v1",
  "published": "2017-07-17T15:17:07.000Z",
  "updated": "2017-07-17T15:17:07.000Z",
  "title": "Toward high-fidelity coherent electron spin transport in a GaAs double quantum dot",
  "authors": [
    "Xinyu Zhao",
    "Xuedong Hu"
  ],
  "comment": "10 pages, 7 figures",
  "categories": [
    "cond-mat.mes-hall",
    "quant-ph"
  ],
  "abstract": "In this paper, we investigate how to achieve high-fidelity electron spin transport in a GaAs double quantum dot. Our study examines spin transport from multiple perspectives. We first study how a double dot potential may affect/accelerate spin relaxation. We calculate spin relaxation rate in a wide range of experimental parameters and focus on the occurrence of spin hot spots. A safe parameter regime is identified in order to avoid these spin hot spots. We also study the non-adiabatic transitions in the Landau-Zener process of sweeping the interdot detuning, and propose a scheme to take advantage of possible Landau-Zener-St\\\"{u}kelburg interference to achieve high-fidelity spin transport at a higher speed. Finally, we calculate the double-dot correction on the effective $g$-factor for the tunneling electron, and estimate the resulting phase error between different spin states. Our results should provide a useful guidance for future experiments on coherent electron spin transport.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2017-07-17T15:17:07.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "high-fidelity coherent electron spin transport",
      "gaas double quantum dot",
      "high-fidelity electron spin transport"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 10,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}