3 papers
cond-mat.mes-hall2025
Abelian Spectral Topology of Multifold Exceptional Points
Marcus Stålhammar, Lukas Rødland
The advent of non-Hermitian physics has enriched the plethora of topological phases to include phenomena without Hermitian counterparts. Despite being among the most well-studied u…
cond-mat.mes-hall2025
Winding Topology of Multifold Exceptional Points
Tsuneya Yoshida, J. Lukas K. König, Lukas Rødland +2
Despite their ubiquity, a systematic classification of multifold exceptional points, -fold spectral degeneracies (EPs), remains a significant unsolved problem. In this articl…
cond-mat.mes-hall2024
Homotopy, Symmetry, and Non-Hermitian Band Topology
Kang Yang, Zhi Li, J. Lukas K. König +3
Non-Hermitian matrices are ubiquitous in the description of nature ranging from classical dissipative systems, including optical, electrical, and mechanical metamaterials, to scatt…