Berlin 2024 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 41: Superconducting Qubits (joint session QI/TT)
TT 41.7: Vortrag
Mittwoch, 20. März 2024, 11:00–11:15, HFT-FT 131
Three wave mixing with a dimer Josephson junction array amplifier — •Mitchell Field1, Nicolas Zapata1, and Ioan M. Pop1,2,3 — 1Institute of Quantum Materials and Technology, Karlsruhe Institute of Technology — 2Physikalisches Institut, Karlsruhe Institute of Technology — 31. Physikalisches Institut, University of Stuttgart
Superconducting Josephson junction parametric amplifiers are robust, low noise amplifiers used to improve the signal to noise ratio of microwave quantum measurements. A common way to generate amplification is with the intrinsic non-linearity of superconducting quantum interference devices (SQUIDs), which sustain four wave mixing processes. In this work we re-engineer an established optical lithography design for dimer Josephson junction array amplifiers [1] by replacing SQUIDs with superconducting non-linear asymmetric inductive elements (SNAILs) [2] which we use to introduce a three wave mixing process. The asymmetric Josephson potential of SNAILs induces a so-called Kerr-free point [3], which we use to improve the dynamic range [4] and increase the signal-pump detuning to several gigahertz.
1. Winkel, P. et al. Phys. Rev. Applied 13, 024015 (2020).
2. Frattini, N. E. et al. Applied Physics Letters 110, 222603 (2017).
3. Sivak, V. V., Shankar, S., Liu, G., Aumentado, J. & Devoret, Phys. Rev. Appl. 13, 024014 (2020).
4. Eichler, C. & Wallraff, A. EPJ Quantum Technol. 1, 119 (2014).
Keywords: Parametric Amplifiers; Three Wave Mixing; Superconducting Circuits