Josephson Junction

AC/DC Josephson Effects · IV Characteristics · Shapiro Steps

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DC: I = I_c sin(φ) — supercurrent
AC: V = (ℏ/2e) dφ/dt — voltage from phase
f_J = 2eV/h = 483.6 MHz/μV
Shapiro: V_n = nℏω_rf/2e (quantized plateaus)