Numerical and Experimental Results on Josephson Junctions Irradiated by a Biharmonic Drive

  • D. Andreone
  • V. Lacquaniti
  • S. Maggi
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 64)


We report some numerical results regarding the characteristics of rf-induced constant voltage steps in a voltage-biased Josephson junction irradiated by a biharmonic drive, namely a rf signal obtained by combining two microwaves of frequency ω and 2ω. The maximization of step amplitudes depends strongly on a careful choice of biharmonic drive parameters. We have made experiments on single, large, Josephson junctions, using a biharmonic signal with a fundamental frequency in the range 8–12 GHz. Under these conditions, only a small enhancement of the amplitude of the quantized steps with respect to the single drive case has been observed.


Amplitude Ratio Josephson Junction Fundamental Signal Small Enhancement Advance Research Workshop 
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Copyright information

© Springer-Verlag Berlin Heidelberg 1992

Authors and Affiliations

  • D. Andreone
    • 1
  • V. Lacquaniti
    • 1
  • S. Maggi
    • 1
  1. 1.Istituto Elettrotecnico Nazionale “G. Ferraris”TorinoItaly

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