Dynamics and Effective Actions of BCS Superconductors
Anne van Otterlo, Dmitrii S. Golubev, Andrei D. Zaikin, Gianni Blatter
Abstract
We derive effective dynamical theories for metals and BCS superconductors, based on the effective action formalism. Both the metallic regime T TC and the superconducting regime T TC are studied in the clean and dirty limit. Furthermore, we consider the effect of particle-hole asymmetry in the band structure. Using gauge invariance, the electrodynamics of the problem is formulated in a transparent way. The effective actions are useful starting points for treating dynamical problems involving BCS superconductors.
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