Riemann-encircling exceptional points for efficient asymmetric polarization-locked devices

A Li, W Chen, H Wei, G Lu, A Alù, CW Qiu, L Chen - Physical Review Letters, 2022 - APS
Dynamically encircling exceptional points (EPs) have unveiled intriguing chiral dynamics in
photonics. However, the traditional approach based on an open manifold of Hamiltonian …

Coexistence of dynamical delocalization and spectral localization through stochastic dissipation

S Weidemann, M Kremer, S Longhi, A Szameit - Nature Photonics, 2021 - nature.com
Anderson's groundbreaking discovery that the presence of stochastic imperfections in a
crystal may result in a sudden breakdown of conductivity revolutionized our understanding …

A perspective on synthetic dimensions in photonics

M Ehrhardt, S Weidemann… - Laser & Photonics …, 2023 - Wiley Online Library
The concept of synthetic dimension has recently emerged as a versatile way to overcome
limitations in the number of effectively available dimensions by leveraging non‐spatial …

Observation of photonic constant-intensity waves and induced transparency in tailored non-Hermitian lattices

A Steinfurth, I Krešić, S Weidemann, M Kremer… - Science …, 2022 - science.org
Light propagation is strongly affected by scattering due to imperfections in the complex
medium. It has been recently theoretically predicted that a scattering-free transport through …

Activating non-Hermitian skin modes by parity-time symmetry breaking

Z Lei, CH Lee, L Li - Communications Physics, 2024 - nature.com
Parity-time (PT) symmetry is a cornerstone of non-Hermitian physics as it ensures real
energies for stable experimental realization of non-Hermitian phenomena. In this work, we …

Thermal control of the topological edge flow in nonlinear photonic lattices

PS Jung, GG Pyrialakos, FO Wu, M Parto… - Nature …, 2022 - nature.com
The chaotic evolution resulting from the interplay between topology and nonlinearity in
photonic systems generally forbids the sustainability of optical currents. Here, we …

Fundamental and dipole gap solitons and their dynamics in the cubic–quintic fractional nonlinear Schrödinger model with a PT-symmetric lattice

L Wang, J Zeng, Y Zhu - Physica D: Nonlinear Phenomena, 2024 - Elsevier
The interplay of two linear controlled terms–fractional diffraction and parity-time (PT)
symmetric lattice–gives rise to unique and interesting linear Bloch gap structures within …

Observation of Anderson localization beyond the spectrum of the disorder

A Dikopoltsev, S Weidemann, M Kremer… - Science …, 2022 - science.org
Anderson localization predicts that transport in one-dimensional uncorrelated disordered
systems comes to a complete halt, experiencing no transport whatsoever. However, in …

Fundamental, dipole, and vortex solitons in fractional nonlinear Schrödinger equation with a parity-time-symmetric periodic potential

S Chen, Y He, X Peng, X Zhu, Y Qiu - Physica D: Nonlinear Phenomena, 2024 - Elsevier
We investigate the existence and stability of two-dimensional (2D) solitons in the framework
of the nonlinear fractional Schrödinger equation (NLFSE) with focusing nonlinearity and a …

Formations and dynamics of two-dimensional spinning asymmetric quantum droplets controlled by a PT-symmetric potential

J Song, Z Yan, BA Malomed - Chaos: An Interdisciplinary Journal of …, 2023 - pubs.aip.org
In this paper, vortex solitons are produced for a variety of 2D spinning quantum droplets
(QDs) in a P T-symmetric potential, modeled by the amended Gross–Pitaevskii equation with …