71 citations · 182 across the 11 of their papers we have counts for
4 papers · 1 filter
Emergent non-Hermitian models
Lumen Eek, Anouar Moustaj, Malte Röntgen +3
The Hatano-Nelson and the non-Hermitian Su-Schrieffer-Heeger model are paradigmatic examples of non-Hermitian systems that host non-trivial boundary phenomena. In this work, we use…
Latent symmetry induced degeneracies
M. Röntgen, M. Pyzh, C. V. Morfonios +3
Degeneracies in the energy spectra of physical systems are commonly considered to be either of accidental character or induced by symmetries of the Hamiltonian. We develop an appro…
Compact localized states and flat bands from local symmetry partitioning
M. Röntgen, C. V. Morfonios, P. Schmelcher
We propose a framework for the connection between local symmetries of discrete Hamiltonians and the design of compact localized states. Such compact localized states are used for t…
Non-Local Currents and the Structure of Eigenstates in Planar Discrete Systems with Local Symmetries
Malte Röntgen, Christian V. Morfonios, Fotios Diakonos +1
Local symmetries are spatial symmetries present in a subdomain of a complex system. By using and extending a framework of so-called non-local currents that has been established rec…