Towards the strong dispersive coupling of a superconducting qubit to a mechanical oscillator.

ORAL

Abstract

The preparation and readout of arbitrary non-classical states of motion is an important goal in the field of quantum cavity optomechanics or electromechanics. One strategy is to couple a mechanical system directly to a strong non-linearity such as a two level system, or qubit. I will present our recent progress on the realization of a hybrid system consisting of an aluminum drumhead and a Cooper pair box. We use a DC-biased capacitive coupling scheme in which coupling strength scales with DC voltage. The maximum DC voltage that can be applied is limited by an electrostatic instability, which we mitigate using a capacitance bridge geometry. This system should be able to reach a regime where the mechanical oscillator can be cooled and prepared in a non-classical state using qubit control.

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Authors

  • Jeremie Viennot

    JILA and Department of Physics, University of Colorado and NIST, JILA and Department of Physics, University of Colorado, Boulder, Colorado 80309, USA

  • Xizheng Ma

    JILA and Department of Physics, University of Colorado, Boulder, Colorado 80309, USA

  • Will Kindel

    JILA, Univ of Colorado - Boulder, JILA and Department of Physics, University of Colorado, Boulder, Colorado 80309, USA

  • Konrad Lehnert

    JILA, University of Colorado at Boulder, National Institute of Standards and Technology, Boulder, JILA and Department of Physics, University of Colorado and NIST, JILA and Department of Physics, University of Colorado, Boulder, Colorado 80309, USA