Fast Long-Distance Control of Spin Qubits by Photon Assisted Cotunneling

ORAL

Abstract

We investigate theoretically the long-distance coupling and spin exchange in an array of quantum dot spin qubits in the presence of microwaves. We find that photon assisted cotunneling is boosted at resonances between photon and energies of virtually occupied excited states and show how to make it spin selective. We identify configurations that enable fast switching and spin echo sequences for efficient and non-local manipulation of spin qubits. We devise configurations in which the near-resonantly boosted cotunneling provides non-local coupling which, up to certain limit, does not diminish with distance between the manipulated dots before it decays weakly with inverse distance.

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Authors

  • Peter Stano

    RIKEN Center for Emergent Matter Science, Wako, Saitama, Japan

  • Jelena Klinovaja

    Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland, Department of Physics, Klingelbergstrasse 82, University of Basel, Switzerland

  • Floris Braakman

    University of Basel, Department of Physics, Klingelbergstrasse 82, University of Basel, Switzerland

  • Lieven Vandersypen

    Kavli Institute of Nanoscience, TU Delft, 2600 GA Delft, The Netherlands

  • Daniel Loss

    Department of Physics, Klingelbergstrasse 82, University of Basel, Switzerland, Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland