Ward identities for disordered metals and superconductors
Disordered Systems and Neural Networks
2009-11-07 v2 Strongly Correlated Electrons
Abstract
This article revisits Ward identities for disordered interacting normal metals and superconductors. It offers a simple derivation based on gauge invariance and recasts the identities in a new form that allows easy analysis of the quasiparticle charge conservation (as e.g. in a normal metal) or non-conservation (as e.g. in a d-wave superconductor).
Keywords
Cite
@article{arxiv.cond-mat/0208030,
title = {Ward identities for disordered metals and superconductors},
author = {Revaz Ramazashvili},
journal= {arXiv preprint arXiv:cond-mat/0208030},
year = {2009}
}
Comments
Discussion of decoherence at T=0 removed