PT-symmetric waveguide system with evidence of a third-order exceptional point
Date
2017
Journal Title
Journal ISSN
Volume Title
Publisher
American Physical Society
Abstract
An experimental setup of three coupled PT -symmetric waveguides showing the characteristics of a third-order
exceptional point (EP3) has been investigated by Heiss and Wunner in an idealized model of three δ-function
waveguides [W. D. Heiss and G. Wunner, J. Phys. A 49, 495303 (2016)]. Here we extend these investigations to
realistic, extended waveguide systems. We place major focus on the strong parameter sensitivity rendering the
discovery of an EP3 a challenging task. We also investigate the vicinity of the EP3 for further branch points of
either cubic- or square-root-type behavior.
Description
CITATION: Schnabel, J., et al. 2017. PT-symmetric waveguide system with evidence of a third-order exceptional point. Physical Review A, 95(5):053868, doi:10.1103/PhysRevA.95.053868.
The original publication is available at http://journals.aps.org/pra
The original publication is available at http://journals.aps.org/pra
Keywords
Waveguide system, Non-Hermitian quantum mechanics, Non-Hermitian Hamiltonians
Citation
Schnabel, J., et al. 2017. PT-symmetric waveguide system with evidence of a third-order exceptional point. Physical Review A, 95(5):053868, doi:10.1103/PhysRevA.95.053868