Coherent charge fluctuations in Josephson junctions and effective capacitance oscillations
I. V. KrivePhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Kharkov and A. M. Gorky State University, KharkovA. S. RozhavskiǐPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Kharkov and A. M. Gorky State University, Kharkov
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Аннотация
A new effect of macroscopic coherent 2e-charge fluctuations leading to voltage oscillations of the effective capacitance is predicted for small Josephson junctions. The oscillation period is Vc = 2e/C (C is the total capacitance of the junction), and the oscillation amplitude decreases rapidly with increasing temperature as exp (−π2T/Ec), where Ec = (2e)2/2C.
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