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## Main Question or Discussion Point

Hello,

which theory or formalism is used to show the superconductors have zero resistance? I'd like to see some derivation from microscopic principles.

For resistivity scattering is crucial so a static wavefunction doesn't offer an explanation?

I read some basic BCS theory and have vaguely heard about Green's functions. What should I read (book?) to see why there is no resistance.

I think the only way to understand physics is to follow the exact mathematical derivation, because I want to understand the phenomenon and not just "justify" it.

Anton

which theory or formalism is used to show the superconductors have zero resistance? I'd like to see some derivation from microscopic principles.

For resistivity scattering is crucial so a static wavefunction doesn't offer an explanation?

I read some basic BCS theory and have vaguely heard about Green's functions. What should I read (book?) to see why there is no resistance.

I think the only way to understand physics is to follow the exact mathematical derivation, because I want to understand the phenomenon and not just "justify" it.

Anton