Double-Fourier engineering of Josephson energy-phase relationships applied to diodes
A.M. Bozkurt (TU Delft - QRD/Wimmer Group, TU Delft - QuTech Advanced Research Centre, Kavli institute of nanoscience Delft)
Jasper Brookman (Kavli institute of nanoscience Delft, Student TU Delft)
Valla Fatemi (Cornell University)
AR Akhmerov (TU Delft - QN/Akhmerov Group, Kavli institute of nanoscience Delft)
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Abstract
We present a systematic method to design arbitrary energy-phase relations using parallel arms of two series Josephson tunnel junctions each. Our approach employs Fourier engineering in the energy-phase relation of each arm and the position of the arms in real space. We demonstrate our method by engineering the energy-phase relation of a near-ideal superconducting diode, which we find to be robust against the imperfections in the design parameters. Finally, we show the versatility of our approach by designing various other energy-phase relations.
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