# Questions tagged [josephson-junction]

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### Characteristic lengths in SNS Josephson Junction

An S-N-S Josephson junction is formed by two Superconducting (S) leads separated by a normal metal (N) which acts like the weak link. While studying, I often encounter the words diffusive, long, ...
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### Origin of Josephson voltage equation?

i cant find a satisfying explanation, and I cant figure it out myself, a derivation for the josephson equation: $$U(t)=\frac{\hbar}{2e}\frac{d\phi}{dt}$$ where $U(t)$ is the voltage, and $\phi$ is the ...
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### Josephson junction characteristics

Is there a physical interpretation for the characteristic frequency and voltage of a josephson junction? $$\omega_c = \frac{2 \pi I_0 R}{\Phi_0}$$ $$V_c = I_0 R$$ $I_0$ is the critical current ...
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### Determining the position and spectral weight of Andreev states from a retarded Green Function

I'm trying to understand a result from the paper Josephson current through a correlated quantum level: Andreev states and $\pi$ junction behavior by Vecino, Martin-Rodero and Yetati (2003). ArXiv link ...
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### How the critical current of Josephson junction is related to the junction thickness and other fundamental constants?

In Josephson effect a quantum (critical) current is found to pass across the junction without an applied voltage. How one can relate this current to the fundamental constants and the junction ...
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### Analogies between Fraunhofer diffraction and Josephson junctions

There are several analogies between diffraction patterns and Josephson junctions, especially between a double slit experiment and two Josephson junctions in a superconducting ring (like this): Both ...