Abstract

The condition of real eigenvalue spectra in quantum mechanics is usually met by requiring operators to be Hermitian. This perception was challenged in 1988 by Carl M. Bender and Stefan Boettcher, who showed that parity-time (PT) symmetric Hamiltonians can have real spectra as well [1]. In photonics this concept was adopted by designing gain and loss structures for electromagnetic waves [2]. While numerous hallmark features [2] could be verified, experiments remained limited to one-dimensional settings. In this work we overcome this limitation and demonstrate a two-dimensional PT-symmetric system of photonic waveguides. We use this structure to study the interplay between a PT-phase transition and the emergence of topological edge states.

© 2019 IEEE

PDF Article
More Like This
Experimental Demonstration of 2D PT-Symmetric Graphene: Bulk Properties and Edge States

Mark Kremer, Tobias Biesenthal, Lukas J. Maczewsky, Matthias Heinrich, Ronny Thomale, and Alexander Szameit
FTu4B.3 CLEO: QELS_Fundamental Science (CLEO_QELS) 2019

Photonic Parity-Time Symmetric Topological Edge States in a Two-Dimensional Lattice

Jiho Noh, Wladimir A. Benalcazar, Taylor L. Hughes, and Mikael C. Rechtsman
FM2Q.2 CLEO: QELS_Fundamental Science (CLEO_QELS) 2018

Photon correlations in PT-symmetric waveguide systems

F. Klauck, L. Teuber, M. Ornigotti, M. Heinrich, S. Scheel, and A. Szameit
ea_p_13 European Quantum Electronics Conference (EQEC) 2019

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription