English

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 K\mathrm{K}-groups of Roe algebras as generalizations of existing invariants such as the Hall conductance or the Kane--Mele Z2\mathbb{Z}_2-invariant. As a consequence, we obtain a new mathematical proof of the bulk-edge correspondence by using the coarse Mayer-Vietoris exact sequence.

Keywords

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

R2 v1 2026-06-22T11:47:12.100Z