Pump-power-efficient 3-wave mixing Josephson parametric amplifier

Josephson Parametric Amplifiers (JPAs) are commonly used in superconducting quantum information processing. In linear amplification regime, a JPA typically requires pump that is orders of magnitude stronger than its output power. Larger signal power handling of a JPA would require application of even stronger pump. However, maximum pump power delivered to a JPA, which is proportional to power dissipated in attenuators, is limited by cooling power of dilution fridges. To address this limitation, we apply on-chip impedance engineering to enable strong coupling of the off-resonance pump to a 3-wave-mixing JPA. Compared to similar JPAs with a capacitively coupled pump port or mutual-inductively coupled flux-pumping, this design requires at least an order of magnitude less pump power, while achieving theoretically quantum-limited amplification with state-of-the-art dynamic range. Preliminary experimental results will be shown.