Josephson Junction
AC/DC Josephson Effects · IV Characteristics · Shapiro Steps
Mode
DC Effect
AC Effect
IV Curve
Shapiro Steps
Bias Current I/I_c
0.50
RF Amplitude I_rf/I_c
0.50
RF Frequency (GHz)
5.0
Damping β_c
1.0
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)