20 citations · 29 across the 9 of their papers we have counts for
9 papers
Higher-order exceptional points in a multimode continuum optoacoustic system
Anton Montag, Julius T. Gohsrich, Quentin Levoy +2
Exceptional points appear in non-Hermitian systems as degeneracies, where not only eigenvalues but also eigenvectors coalesce. They are of great theoretical and experimental intere…
Multi-dimensional parameter space of higher-order exceptional points induced by Brillouin optoacoustics
Grigorii Slinkov, Anton Montag, Julius T. Gohsrich +4
Exceptional points (EPs) are degeneracies in the spectrum of non-Hermitian systems, where both the eigenvalues and eigenvectors coalesce. In the vicinity of an n-th order EP, the e…
Non-Hermitian Landau Levels
Anton Montag, Tomoki Ozawa
We formulate non-Hermitian Landau levels in two-dimensional systems under a complex perpendicular magnetic field. In the symmetric gauge, we derive their discretely spaced, highly…
Quantum geometrical effects in non-Hermitian systems
Anton Montag, Tomoki Ozawa
We explore the relation between quantum geometry in non-Hermitian systems and physically measurable phenomena. We highlight various situations in which the behavior of a non-Hermit…
The analytically tractable zoo of similarity-induced exceptional structures
Anton Montag, Jordan Isaacs, Marcus Stålhammar +1
Exceptional points (EPs) are non-Hermitian spectral degeneracies marking a simultaneous coalescence of eigenvalues and eigenvectors. Despite the fact that multiband -fold EPs (E…
Spectral Riemann Sheet Topology of Gapped Non-Hermitian Systems
Anton Montag, Alexander Felski, Flore K. Kunst
We show topological configurations of the complex-valued spectra in gapped non-Hermitian systems. These arise when the distinctive EPs in the energy Riemann sheets of such models a…
Robust gap closing and reopening in topological-insulator Josephson junctions
Jakob Schluck, Ella Nikodem, Anton Montag +4
In the seminal proposal by Fu and Kane, the superconducting proximity effect is used to realize topological superconductivity in the topological surface state (TSS) of a 3D topolog…
Essential implications of similarities in non-Hermitian systems
Anton Montag, Flore K. Kunst
In this paper, we show that three different generalized similarities enclose all unitary and anti-unitary symmetries that induce exceptional points in lower-dimensional non-Hermiti…
Symmetry-induced higher-order exceptional points in two dimensions
Anton Montag, Flore K. Kunst
Exceptional points of order (EPs) appear in non-Hermitian systems as points where the eigenvalues and eigenvectors coalesce. They emerge if real constraints are imp…