842 citations · 1.8k across the 12 of their papers we have counts for
14 papers
Roadmap on Topological Photonics
Hannah Price, Yidong Chong, Alexander Khanikaev +20
Topological photonics seeks to control the behaviour of the light through the design of protected topological modes in photonic structures. While this approach originated from stud…
Nonlinear second-order photonic topological insulators
Marco S. Kirsch, Yiqi Zhang, Mark Kremer +7
Higher-order topological insulators (HOTI) are a novel topological phase beyond the framework of the conventional bulk-boundary correspondence. In these peculiar systems, the topol…
Topological defect engineering and PT-symmetry in non-Hermitian electrical circuits
Alexander Stegmaier, Stefan Imhof, Tobias Helbig +14
We employ electric circuit networks to study topological states of matter in non-Hermitian systems enriched by parity-time symmetry and chiral symmetry anti-$\mathca…
Nonlinearity-induced photonic topological insulator
Lukas J. Maczewsky, Matthias Heinrich, Mark Kremer +8
The hallmark feature of topological insulators renders edge transport virtually impervious to scattering at defects and lattice disorder. In our work, we experimentally demonstrate…
Non-Hermitian Anderson Transport
Sebastian Weidemann, Mark Kremer, Stefano Longhi +1
Andersons groundbreaking discovery that the presence of stochastic imperfections in a crystal may result in a sudden breakdown of conductivity revolutionized our understanding of d…
Experimental observation of Aharonov-Bohm caging using orbital angular momentum modes in optical waveguides
C. Jörg, G. Queraltó, M. Kremer +6
The discovery of artificial gauge fields, controlling the dynamics of uncharged particles that otherwise elude the influence of standard electric or magnetic fields, has revolution…
Efficient Light Funneling based on the non-Hermitian Skin Effect
Sebastian Weidemann, Mark Kremer, Tobias Helbig +5
In the last two decades, the ubiquitous effect of dissipation has proven to entail astonishing non-Hermitian features, rather than just being an inescapable nuisance. As an alterna…
Topological state engineering via supersymmetric transformations
Gerard Queralto, Mark Kremer, Lukas J. Maczewsky +4
The quest to explore new techniques for the manipulation of topological states simultaneously promotes a deeper understanding of topological physics, and is essential in identifyin…
Experimental realisation of -symmetric flat bands
Tobias Biesenthal, Mark Kremer, Matthias Heinrich +1
The capability to temporarily arrest the propagation of optical signals is one of the main challenges hampering the ever more widespread use of light in rapid long-distance transmi…
Optimal design strategy for non-Abelian geometric phases using Abelian gauge fields based on quantum metric
Mark Kremer, Lucas Teuber, Alexander Szameit +1
Geometric phases, which are ubiquitous in quantum mechanics, are commonly more than only scalar quantities. Indeed, often they are matrix-valued objects that are connected with non…
Fermionic time-reversal symmetry in a photonic topological insulator
Lukas J. Maczewsky, Bastian Höckendorf, Mark Kremer +5
Much of the recent enthusiasm directed towards topological insulators as a new state of matter is motivated by their hallmark feature of protected chiral edge states. In fermionic…
Demonstration of a two-dimensional PT-symmetric crystal: Bulk dynamics, topology, and edge states
Mark Kremer, Tobias Biesenthal, Matthias Heinrich +2
In 1998, Carl Bender challenged the perceived wisdom of quantum mechanics that the Hamiltonian operator describing any quantum mechanical system has to be Hermitian. He showed that…
Non-quantized square-root topological insulators: a realization in photonic Aharonov-Bohm cages
Mark Kremer, Ioannis Petrides, Eric Meyer +3
Topological Insulators are a novel state of matter where spectral bands are characterized by quantized topological invariants. This unique quantized non-local property commonly man…
Twonniers: Interaction-induced effects on Bose-Hubbard parameters
Mark Kremer, Rashi Sachdeva, Albert Benseny +1
We study the effects of the repulsive on-site interactions on the broadening of the localized Wannier functions used for calculating the parameters to describe ultracold atoms in o…