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Emulating weak localization using a solid-state quantum circuit

Author

Listed:
  • Yu Chen

    (University of California
    Present address: Google Inc., Santa Barbara, California, 93117, USA)

  • P. Roushan

    (University of California
    Present address: Google Inc., Santa Barbara, California, 93117, USA)

  • D. Sank

    (University of California
    Present address: Google Inc., Santa Barbara, California, 93117, USA)

  • C. Neill

    (University of California)

  • Erik Lucero

    (University of California
    Present address: HRL Laboratories, LLC, Malibu, California 90265, USA)

  • Matteo Mariantoni

    (University of California
    California NanoSystems Institute, University of California
    Present address: Institute for Quantum Computing and Department of Physics and Astronomy, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1)

  • R. Barends

    (University of California)

  • B. Chiaro

    (University of California)

  • J. Kelly

    (University of California)

  • A. Megrant

    (University of California
    University of California)

  • J. Y. Mutus

    (University of California)

  • P. J. J. O'Malley

    (University of California)

  • A. Vainsencher

    (University of California)

  • J. Wenner

    (University of California)

  • T. C. White

    (University of California)

  • Yi Yin

    (University of California
    Present address: Department of Physics, Zhejiang University, Hangzhou 310027, China)

  • A. N. Cleland

    (University of California
    California NanoSystems Institute, University of California)

  • John M. Martinis

    (University of California
    California NanoSystems Institute, University of California
    Present address: Google Inc., Santa Barbara, California, 93117, USA
    Present address: Department of Physics, University of California, Santa Barbara, California 93106-9530, USA and California NanoSystems Institute, University of California, Santa Barbara, California, 93106-6105, USA)

Abstract

Quantum interference is one of the most fundamental physical effects found in nature. Recent advances in quantum computing now employ interference as a fundamental resource for computation and control. Quantum interference also lies at the heart of sophisticated condensed matter phenomena such as Anderson localization, phenomena that are difficult to reproduce in numerical simulations. Here, employing a multiple-element superconducting quantum circuit, with which we manipulate a single microwave photon, we demonstrate that we can emulate the basic effects of weak localization. By engineering the control sequence, we are able to reproduce the well-known negative magnetoresistance of weak localization as well as its temperature dependence. Furthermore, we can use our circuit to continuously tune the level of disorder, a parameter that is not readily accessible in mesoscopic systems. Demonstrating a high level of control, our experiment shows the potential for employing superconducting quantum circuits as emulators for complex quantum phenomena.

Suggested Citation

  • Yu Chen & P. Roushan & D. Sank & C. Neill & Erik Lucero & Matteo Mariantoni & R. Barends & B. Chiaro & J. Kelly & A. Megrant & J. Y. Mutus & P. J. J. O'Malley & A. Vainsencher & J. Wenner & T. C. Whit, 2014. "Emulating weak localization using a solid-state quantum circuit," Nature Communications, Nature, vol. 5(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms6184
    DOI: 10.1038/ncomms6184
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