22 citations · 60 across the 5 of their papers we have counts for
5 papers
Latent Su-Schrieffer-Heeger models
Malte Röntgen, Xuelong Chen, Wenlong Gao +5
The Su-Schrieffer-Heeger (SSH) chain is the reference model of a one-dimensional topological insulator. Its topological nature can be explained by the quantization of the Zak phase…
Hidden symmetries in acoustic wave systems
Malte Röntgen, Christian V. Morfonios, Peter Schmelcher +1
Mirror symmetry of a wave system imposes corresponding even or odd parity on its eigenmodes. For a discrete system, eigenmode parity on a specific subset of sites may also originat…
On symmetries of a matrix and its isospectral reduction
Malte Röntgen, Maxim Pyzh, Christian V. Morfonios +1
The analysis of diagonalizable matrices in terms of their so-called isospectral reduction represents a versatile approach to the underlying eigenvalue problem. Starting from a symm…
Cospectrality preserving graph modifications and eigenvector properties via walk equivalence of vertices
Christian V. Morfonios, Maxim Pyzh, Malte Röntgen +1
Originating from spectral graph theory, cospectrality is a powerful generalization of exchange symmetry and can be applied to all real-valued symmetric matrices. Two vertices of an…
Local symmetry theory of resonator structures for the real-space control of edge states in binary aperiodic chains
Malte Röntgen, Christian V. Morfonios, Ren Wang +2
We propose a real-space approach explaining and controlling the occurrence of edge-localized gap states between the spectral quasibands of binary tight binding chains with determin…