II. Applications of the Josephson Effect

R. Gross, A. Marx, and F. Deppe © Walther-Meißner-Institut (2001 - 2013)
4.1.1 The Zero Voltage State
AS-Chap. 4 - 7
• substitution:
• integration of A:
closed loop total flux Φ 0 threading the loop
• integration for J s :
J s vanishes deep inside electrode material ∫ ΛJ s ⋅ dl vanishes
• result: phase differences are not independent but linked via the fluxoid quantization:
• if Φ = Φ ext : maximum possible supercurrent is obtained for sin(…) = 1 as
problem solved!