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Superconductivity is the transmission of current with no resistive losses, and is one of the most active areas of condensed matter physics research.

7 votes

Relation between scattering matrix and an effective Hamiltonian

It's been some time since this question has been asked, but allow me to post a new answer. Its piece of my thesis, where I've put the derivation (since its so hard to find). I hope it'll help anyone, …
Michał Jan's user avatar