Causality vs. Ward identity in disordered electron systems

Details Causality vs. Ward identity in disordered electron systems Causality vs. Ward identity in disordered electron systems

2003-07-18

arxiv.org/abs/cond-mat/0307455v2

Mod. Phys. Lett. B18, 1051 (2004)

Physics

Condensed Matter

Disordered Systems and Neural Networks

4 pages, REVTeX, 6 EPS figures

Scientific paper

10.1142/S0217984904007591

We address the problem of fulfilling consistency conditions in solutions for disordered noninteracting electrons. We prove that if we assume the existence of the diffusion pole in an electron-hole symmetric theory we cannot achieve a solution with a causal self-energy that would fully fit the Ward identity. Since the self-energy must be causal, we conclude that the Ward identity is partly violated in the diffusive transport regime of disordered electrons. We explain this violation in physical terms and discuss its consequences.

Affiliated with

Also associated with

No associations

Rating

Causality vs. Ward identity in disordered electron systems does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Causality vs. Ward identity in disordered electron systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Causality vs. Ward identity in disordered electron systems will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-489177