Eliashberg equations derived from the functional renormalization group
Superconductivity
2009-11-11 v1 Strongly Correlated Electrons
Abstract
We describe how the fermionic functional renormalization group (fRG) flow of a Cooper+forward scattering problem can be continued into the superconducting state. This allows us to reproduce from the fRG flow the fundamental equations of the Eliashberg theory for superconductivity at all temperatures including the symmetry-broken phase. We discuss possible extensions of this approach like the inclusion of vertex corrections.
Keywords
Cite
@article{arxiv.cond-mat/0501674,
title = {Eliashberg equations derived from the functional renormalization group},
author = {Carsten Honerkamp and Manfred Salmhofer},
journal= {arXiv preprint arXiv:cond-mat/0501674},
year = {2009}
}
Comments
9 pages, 4 figures