Three-wave mixing Josephson traveling wave parametric amplifiers at 750 MHz and 1500 MHz
ORAL
Abstract
We present our latest results on Josephson traveling wave parametric amplifiers (TWPAs), which are currently in fabrication with our Nb/Al-AlOx/Nb junction process. As a follow-up of our successful 4-9 GHz demonstrator operating in three-wave mixing, we are pursuing the adaptation of the TWPA concept to lower radio frequency bands. The motivation is to extend the application area to, e.g., spin qubit quantum computing. The device design features superconducting nonlinear asymmetric inductive elements (SNAILs), and an integrated on-chip magnetic flux bias line. We will discuss how we approach some specific low-frequency challenges such as control over footprint and engineered dispersion.
*This research was funded by EU Quantum Flagship (OpenSuperQ 820363, QMiCS 820505), the European Microkelvin Platform 824109, and Academy of Finland (Centre of Excellence Quantum Technology Finland 336817 and 336819, and grant 321700).
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Publication: V. Vesterinen and J. Hassel, Finnish patent application 20195045, published July 25, 2020
V. Vesterinen and S. Simbierowicz, Finnish patent application 20205401, published October 21, 2021
M. Perelshtein et al., "Broadband continuous variable entanglement generation using a Kerr-free Josephson metamaterial", manuscript submitted for publication
Presenters
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Visa Vesterinen
- VTT Micro & Nanoelectronics
- QTF Center of Excellence, VTT Technical Research Centre of Finland
- VTT Technical Research Centre of Finland
- VTT Technical Research Centre of Finland Ltd