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Topological Quantum Computing

Topological Classification of Insulators: II. Quasi-Two-Dimensional Locality

arXiv
Authors: Jui-Hui Chung, Jacob Shapiro

Year

2024

Paper ID

66775

Status

Preprint

Abstract Read

~2 min

Abstract Words

93

Citations

N/A

Abstract

We provide an alternative characterization of two-dimensional locality (necessary e.g. to define the Hall conductivity of a Fermi projection) using the spectral projections of the Laughlin flux operator. Using this abstract characterization, we define generalizations of this locality, which we term quasi-2D. We go on to calculate the path-connected components of spaces of unitaries or orthogonal projections which are quasi-2D-local and find a starkly different behavior compared with the actual 2D column of the Kitaev table, exhibiting e.g., in the unitary chiral case, infinitely many mathbb{Z}-valued indices.

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  • This paper contributes to the Topological Quantum Computing research area in the Quantum Articles archive.
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  • We provide an alternative characterization of two-dimensional locality (necessary e.g.

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