22 citations · 38 across the 11 of their papers we have counts for
11 papers
Spectral-topology-induced criticality in non-Hermitian fermionic metals
Ayan Banerjee, Julius T. Gohsrich, Flore K. Kunst
Quantum matter emerges from the interplay of fluctuations, topology, and entanglement, which - in equilibrium - governs quantized transport, universal criticality, and topological…
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…
From order to chaos in a chip-scale Kerr parametric oscillator
Luca O. Trinchão, Juan Diego Mazo-Vásquez, Miguel Nienstedt +13
Integrated photonics has enabled a wide class of chip-scale light sources and quantum technologies. Within this field, microresonator-based degenerate optical parametric oscillator…
An Algebraic Approach to Bifurcations in Kerr Ring and Fabry-Perot Resonators
Juan Diego Mazo-Vasquez, Julius T. Gohsrich, Flore K. Kunst +1
Nonlinear phenomena such as optical bistability and spontaneous symmetry breaking play a central role in Kerr resonators, and are increasingly exploited in photonic integrated circ…
Exceptional, but Separate: Precursors to Spontaneous Symmetry Breaking
Lewis Hill, Julius T. Gohsrich, Alekhya Ghosh +3
Spontaneous symmetry breaking (SSB) and exceptional points (EPs) are often assumed to be inherently linked. Here we investigate the intricate relationship between SSB and specific…
Solving Dicke superradiance analytically: A compendium of methods
Raphael Holzinger, Nico S. Bassler, Julian Lyne +3
We present several analytical approaches to the Dicke superradiance problem, which involves determining the time evolution of the density operator for an initially inverted ensembl…
The non-Hermitian skin effect: A perspective
Julius T. Gohsrich, Ayan Banerjee, Flore K. Kunst
The non-Hermitian (NH) skin effect is a truly NH feature, which manifests itself as an accumulation of states, known as skin states, on the boundaries of a system. In this perspect…
Exceptional points of any order in a generalized Hatano-Nelson model
Julius T. Gohsrich, Jacob Fauman, Flore K. Kunst
Exceptional points (EPs) are truly non-Hermitian (NH) degeneracies where matrices become defective. The order of such an EP is given by the number of coalescing eigenvectors. On th…
Perturbation theory of nearly spherical dielectric optical resonators
Julius Gohsrich, Tirth Shah, Andrea Aiello
Dielectric spheres of various sizes may sustain electromagnetic whispering-gallery modes resonating at optical frequencies with very narrow linewidths. Arbitrary small deviations f…
Perturbation Theory of Optical Resonances of Deformed Dielectric Spheres
Julius Gohsrich
Light injected into a spherical dielectric body may be confined very efficiently via the mechanism of total internal reflection. The frequencies that are most confined are called r…