Universality of charge transport in weakly interacting fermionic systems
Abstract
We review two rigorous results on the transport properties of weakly interacting fermionic systems on lattices, in the linear response regime. First, we discuss the universality of the longitudinal conductivity for interacting graphene. Then, we focus on the transverse conductivity of general weakly interacting gapped fermionic systems, and we establish its universality. This last result proves the stability of the integer quantum Hall effect against weak interactions. The proofs are based on combinations of fermionic cluster expansion techniques, renormalization group and lattice Ward identities.
Keywords
Cite
@article{arxiv.1602.01021,
title = {Universality of charge transport in weakly interacting fermionic systems},
author = {Alessandro Giuliani and Vieri Mastropietro and Marcello Porta},
journal= {arXiv preprint arXiv:1602.01021},
year = {2016}
}
Comments
8 pages, no figures. Contribution to the proceedings of the XVIII International Congress on Mathematical Physics, Santiago de Chile, July 27 - August 1, 2015