{
  "id": "1112.0140",
  "version": "v1",
  "published": "2011-12-01T11:26:04.000Z",
  "updated": "2011-12-01T11:26:04.000Z",
  "title": "Magnetically induced pumping and memory storage in quantum rings",
  "authors": [
    "Michele Cini",
    "Enrico Perfetto"
  ],
  "comment": "5 pages, 6 figures, accepted by Phys. Rev. B",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "Nanoscopic rings pierced by external magnetic fields and asymmetrically connected to wires behave in sharp contrast with classical expectations. By studying the real-time evolution of tight-binding models in different geometries, we show that the creation of a magnetic dipole by a bias-induced current is a process that can be reversed: connected rings excited by an internal ac flux produce ballistic currents in the external wires. In particular we point out that, by employing suitable flux protocols, single-parameter nonadiabatic pumping can be achieved, and an arbitrary amount of charge can be transferred from one side to the other. We also propose a set up that could serve a memory device, in which both the operations of {\\it writing} and {\\it erasing} can be efficiently performed.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2011-12-01T11:26:04.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "05.60.Gg",
      "73.63.Rt"
    ],
    "keywords": [
      "quantum rings",
      "memory storage",
      "magnetically induced pumping",
      "internal ac flux produce ballistic",
      "ac flux produce ballistic currents"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1103/PhysRevB.84.245201",
      "journal": "Physical Review B",
      "year": 2011,
      "month": "Dec",
      "volume": 84,
      "number": 24,
      "pages": 245201
    },
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2011PhRvB..84x5201C"
    }
  }
}