Single Shot Charge Detection Using A Radio-Frequency Quantum Point Contact

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Cassidy, M. C. ; Dzurak, A. S. ; Clark, R. G. ; Petersson, K. D. ; Farrer, I. ; Ritchie, D. A. ; Smith, C. G. (2009)
  • Related identifiers: doi: 10.1063/1.2809370
  • Subject: Condensed Matter - Mesoscale and Nanoscale Physics
    arxiv: Condensed Matter::Mesoscopic Systems and Quantum Hall Effect

We report on charge sensing measurements of a GaAs semiconductor quantum dot device using a radio frequency quantum point contact (rf-QPC). The rf-QPC is fully characterized at 4 K and milli-Kelvin temperatures and found to have a bandwidth exceeding 20 MHz. For single-shot charge sensing we achieve a charge sensitivity of 2x10^-4 e/(sqrt)Hz referred to the neighboring dot's charge. The rf-QPC compares favorably with rf-SET electrometers and promises to be an extremely useful tool for characterizing and measuring semiconductor quantum systems on fast timescales.
  • References (17)
    17 references, page 1 of 2

    1 J. M. Elzerman, R. Hanson, L. H. W. van Beveren, B. Witkamp, L. M. K.Vandersypen and L. P. Kouwenhoven, Nature 430 431 (2004)

    2 S. Gustavsson, R. Leturcq, B. Simovic, R. Schleser, T. Ihn, P. Studerus, K. Ensslin, D. C. Driscoll and A. C. Gossard, Phys. Rev. Lett. 96 076605 (2006)

    3 J.R. Petta, A.C. Johnson, J.M. Taylor, E.A. Laird, A. Yacoby, M.D. Lukin, C.M. Marcus, M.P. Hanson, A.C. Gossard, Science 309 2180 (2005)

    4 M. Field, C. G. Smith, M. Pepper, D. A. Ritchie, J. E. F. Frost, G. A. C. Jones and D. G. Hasko, Phys. Rev. Lett. 70 1311 (1993)

    5 T. Meunier, I. T. Vink, L. H. Willems van Beveren, K-J. Tielrooij, R. Hanson, F. H. L. Koppens, H. P. Tranitz, W. Wegscheider, L. P. Kouwenhoven and L. M. K. Vandersypen, Phys. Rev. Lett. 98 126601 (2007)

    6 L. M. K. Vandersypen, J. M. Elzerman, R. N. Schouten, L. H. Willems van Beveren, R. Hanson and L. P. Kouwenhoven, Phys. Rev. Lett. 85 4394 (2004)

    7 R. J. Schoelkopf, P. Wahlgren, A. A. Kozhevnikov, P. Delsing and D. E. Prober, Science 280 1238 (1998)

    8 W. Lu, Z. Ji, L. Pfei er, K.W. West and A.J. Rimberg, Nature 423 422 (2003)

    9 J. Regul, F. Hohls, D. Reuter,A.D. Wieck, R.J. Haug, Physica E: Low-dimensional Systems and Nanostructures 22 272 (2004)

    10 H. Qin and D. A. Williams, Appl. Phys. Lett. 88 203506 (2006)

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