Progress towards a near quantum-limited Josephson travelling wave parametric amplifier based on Nb-Al/Al<sub>2</sub>O<sub>3</sub>-Nb trilayer technology.
ORAL
Abstract
The interest in travelling wave parametric amplifiers (TWPAs) has dramatically increased over the past decade due to their ability to enhance quantum efficiency of measurements while retaining a large bandwidth and dynamic range essential for the operation of large-scale frequency-multiplexed systems. Here we report on the developments in the fabrication of a TWPA based on Josephson transmission line periodically loaded with resonators for phase-matching. We present the optimized process for the fabrication of the Nb-Al/Al2O3-Nb trilayer-based Josephson circuits and the results of the characterization of the fabricated devices.
*This work was supported by the SNSF under Grant agmt No. NCCR-QSIT: 51NF40_185902, the European Research Council (ERC) under the EU H2020 research and innovation programme, Grant agmt No. 835329 (ExCOM-cCEO). The samples were fabricated in part in the Center of MicroNanoTechnology (CMi) at EPFL
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Presenters
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Evgenii Guzovskii
- EPFL