Programmable dual-band acoustic topological insulator with dynamically movable interface states

Y Ge, B Shi, J Xia, H Sun, S Yuan, H Xue… - Applied Physics …, 2023 - pubs.aip.org
Topological acoustic interface states in one-dimensional (1D) acoustic topological insulators
(ATIs) are zero-dimensional (0D) topological states localized at an interface. Unlike …

Anomalous mobility edges in one-dimensional quasiperiodic models

T Liu, X Xia, S Longhi, L Sanchez-Palencia - SciPost Physics, 2022 - scipost.org
Mobility edges, separating localized from extended states, are known to arise in the single-
particle energy spectrum of disordered systems in dimension strictly higher than two and …

Topological states protected by hidden symmetry

M Röntgen, X Chen, W Gao, M Pyzh, P Schmelcher… - Physical Review B, 2024 - APS
Symmetries play a paramount role in many aspects of topological physics. A particularly
illuminating example is the Su-Schrieffer-Heeger (SSH) chain, whose reflection and chiral …

Equireflectionality and customized unbalanced coherent perfect absorption in asymmetric waveguide networks

M Röntgen, O Richoux, G Theocharis, CV Morfonios… - Physical Review …, 2023 - APS
We explore the scattering of waves in designed asymmetric one-dimensional waveguide
networks. We show that the reflection between two ports of an asymmetric network can be …

Direct measurement of acoustic spectral density and fractional topological charge

H Ge, ZW Long, XY Xu, JG Hua, Y Liu, BY Xie… - Physical Review …, 2023 - APS
LDOS is a fundamental spectral property that plays a central role in various physical
phenomena, such as wave-matter interactions and spontaneous emissions. The role of …

Existence and characterization of edge states in an acoustic trimer Su-Schrieffer-Heeger model

I Ioannou Sougleridis, A Anastasiadis, O Richoux… - Physical Review B, 2024 - APS
We report on a direct mapping of acoustic slender waveguides to the one-dimensional trimer
Su-Schrieffer-Heeger model, with neither chiral nor mirror symmetry. Importantly, we can …

Hidden symmetries in acoustic wave systems

M Röntgen, CV Morfonios, P Schmelcher… - Physical Review Letters, 2023 - APS
Latent symmetries are hidden symmetries which become manifest by performing a reduction
of a given discrete system into an effective lower-dimensional one. We show how latent …

Negative refraction of water waves by hyperbolic metamaterials

LP Euvé, K Pham, A Maurel - Journal of Fluid Mechanics, 2023 - cambridge.org
We study the propagation of water waves in a three-dimensional device alternating open
canals and resonant canals with subwavelength resonances. The dispersion of water waves …

Small admixture of nonadiabaticity facilitating topologically protected splitters and routers via optimizing coupling engineering

JN Zhang, JL Wu, JX Han, S Tang, J Song, YY Jiang - Physical Review B, 2024 - APS
We propose to implement fast and robust quantum state transfer in symmetrical beam
splitters and routers through a specific topological edge channel in splicing Su-Schrieffer …

Application of quantum graph theory to metamaterial design: Negative refraction of acoustic waveguide modes

TM Lawrie, TA Starkey, G Tanner, DB Moore… - Physical Review …, 2024 - APS
We leverage quantum graph theory to quickly and accurately characterize acoustic
metamaterials comprising networks of interconnected pipes. Anisotropic bond lengths are …