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quant-ph2024
Quantum Sensing with Driven-Dissipative Su-Schrieffer-Heeger Lattices
Oscar Arandes, Emil J. Bergholtz
The remarkable sensitivity of non-Hermitian systems has been extensively studied and stimulated ideas about developing new types of sensors. In this paper, we examine a chain of pa…
cond-mat.mes-hall2024
Braids and Higher-order Exceptional Points from the Interplay Between Lossy Defects and Topological Boundary States
Zi-Jian Li, Gabriel Cardoso, Emil J. Bergholtz +1
We show that the perturbation of the Su-Schrieffer-Heeger chain by a localized lossy defect leads to higher-order exceptional points (HOEP). Depending on the location of the defect…