Controlled topological phases and bulk-edge correspondence
Mathematical Physics
2016-07-20 v4 K-Theory and Homology
math.MP
Abstract
In this paper, we introduce a variation of the notion of topological phase reflecting metric structure of the position space. This framework contains not only periodic and non-periodic systems with symmetries in Kitaev's periodic table but also topological crystalline insulators. We also define the bulk and edge indices as invariants taking values in the twisted equivariant -groups of Roe algebras as generalizations of existing invariants such as the Hall conductance or the Kane--Mele -invariant. As a consequence, we obtain a new mathematical proof of the bulk-edge correspondence by using the coarse Mayer-Vietoris exact sequence.
Cite
@article{arxiv.1511.05314,
title = {Controlled topological phases and bulk-edge correspondence},
author = {Yosuke Kubota},
journal= {arXiv preprint arXiv:1511.05314},
year = {2016}
}
Comments
30 pages, Section 2 is completely rewritten