Berlin 2018 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 99: Poster Session: Transport
TT 99.36: Poster
Donnerstag, 15. März 2018, 15:00–19:00, Poster B
Fabrication and Characterization of SQUID-Array Parametric Amplifiers — •Daniel Arweiler1,2, Kirill G. Fedorov1,2, Stefan Pogorzalek1,2, Peter Eder1,2,3, Michael Fischer1,2,3, Edwar Xie1,2,3, Achim Marx1, Frank Deppe1,2,3, and Rudolf Gross1,2,3 — 1Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany — 2Physik-Department, TU München, 85748 Garching, Germany — 3Nanosystems Initiative Munich (NIM), 80799 München, Germany
In the rapidly evolving field of quantum information processing and circuit QED, Josephson parametric amplifiers (JPAs) have emerged as key building blocks. They consist of a coplanar waveguide resonator coupled to a dc superconducting quantum interference device (SQUID). The latter acts as flux-tunable nonlinearity enabling parametric effects, including quantum-limited amplification of weak signals and generation of squeezed microwave light.
In our work, we investigate advanced versions of JPAs with dc-SQUID arrays instead of a single dc-SQUID to enhance the dynamic range and 1-dB compression point. We employ the well-established technologies of electron-beam lithography and aluminium shadow evaporation to fabricate our samples. We characterize our JPAs at millikelvin temperatures using transmission microwave measurements with a network analyzer and conclude by comparing key properties such as gain and 1-dB compression point between various designs.
The authors acknowledge support from DFG through FE 1564/1-1.