Spin coherence in Multi-electron GaAs double dots

ORAL

Abstract

Experimental investigation of spin manipulation and readout in multi-electron double quantum dots is reported. For occupations of order 10 electrons, spin blockade in both transport and pulsed-gate measurements is identified. Exchange rotations, dynamical decoupling, S/T+ beamsplitter experiments, and single-shot readout can all be implemented similar to the single-electron case. These demonstrations are relevant for the practical operation and scaling of GaAs spin qubits.

*Support from IARPA/MQCO, DARPA/QuEST, DOE SCGF, NSF-MWN, and Harvard University is acknowledged.

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Authors

  • Andrew P. Higginbotham

    • Department of Physics, Harvard University

  • Ferdinand Kuemmeth

    • Department of Physics, Harvard University
    • Harvard University

  • Christian Barthel

    • Department of Physics, Harvard University

  • Charles M. Marcus

    • Harvard University
    • Department of Physics, Harvard University

  • Micah P. Hanson

    • Materials Department, University of California, Santa Barbara

  • Arthur Gossard

    • Materials Department, University of California, Santa Barbara, California 93106, USA
    • Materials Department, University of California, Santa Barbara
    • University of California, Santa Barbara