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Topological Quantum Computing

Probing topological invariants in the bulk of a non-Hermitian optical system

arXiv
Authors: Julia M. Zeuner, Mikael C. Rechtsman, Yonatan Plotnik, Yaakov Lumer, Mark S. Rudner, Mordechai Segev, Alexander Szameit

Year

2014

Paper ID

48133

Status

Preprint

Abstract Read

~2 min

Abstract Words

80

Citations

N/A

Abstract

Topological insulators are insulating in the bulk but feature conducting states on their surfaces. Standard methods for probing their topological properties largely involve probing the surface, even though topological invariants are defined via the bulk band structure. Here, we utilize non-hermiticy to experimentally demonstrate a topological transition in an optical system, using bulk behavior only, without recourse to surface properties. This concept is relevant for a wide range of systems beyond optics, where the surface physics is difficult to probe.

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  • This paper contributes to the Topological Quantum Computing research area in the Quantum Articles archive.
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  • Topological insulators are insulating in the bulk but feature conducting states on their surfaces.

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