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Power-efficient 3-wave mixing Josephson parametric amplifier

ORAL

Abstract

Josephson Parametric Amplifiers (JPAs) are commonly used in superconducting quantum information processing. A JPA is powered by an rf pump, which typically is orders of magnitude stronger than its output signal. Increasing signal power handling of JPAs would generally require stronger pump. However, the maximum pump power we are able to deliver is limited by the thermalization of the wiring linking the amplifier to room temperature. To address this limitation, we have engineered strong coupling of the off-resonance pump in a 3-wave mixing JPA. Compared to similar JPAs with a capacitively coupled pump port or mutual-inductively coupled flux-pumping, this technique improves power efficiency by at least an order of magnitude without lowering dynamic range and noise performance. Preliminary experimental results will be shown.

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Presenters

  • Wei Dai

    Applied Physics Department, Yale University, Yale University

Authors

  • Wei Dai

    Applied Physics Department, Yale University, Yale University

  • Volodymyr Sivak

    Applied Physics Department, Yale University, Yale University, Department of Applied Physics and Physics, Yale University

  • Gangqiang Liu

    Yale University, Applied Physics Department, Yale University

  • Shyam Shankar

    University of Texas at Austin, Yale University, Department of electrical and computer engineering, University of Austin, Yale University, Univ. of Texas at Austin

  • Michel Devoret

    Yale University, Applied Physics Department, Yale University, Yale, Department of Applied Physics and Physics, Yale University, Applied Physics, Yale University, Departments of Applied Physics and Physics, Yale University