Sound wave interaction with Josephson junction and transformation of the contact coherent binding energy into ultrasonic waves |
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| Institution: | 1. Physics & Computer Science, Wilfrid Laurier University, Waterloo, Ontario, Canada;2. Dipartimento di Fisica and MINAS-Lab, Università di Roma “Tor Vergata”, I-00133 Roma, Italy;3. Department of Mathematics, University of California, Davis, CA 95616, United States;4. Department of Mechanical and Aerospace Engineering, University of California, Davis, CA 95616, United States |
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| Abstract: | The problem of ultrasonic wave propagation in narrow Josephson junctions at nonzero temperature has been investigated. Using the derived solution of the nonstationary Fokker-Planck equation, the total current flowing through the narrow Josephson junction is calculated, and the coefficient of the ultrasonic wave passage through the Josephson junction is determined. The singularity of this coefficient is studied in the ultrasound amplification mode associated with the transformation of coherent binding energy of the contact into ultrasonic waves, and the possibility of experimental measurement of the lifetime of the Josephson junction in the metastable state under the conditions of maximum ultrasound amplification by the contact is discussed. |
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