Programmable dual-band acoustic topological insulator with dynamically movable interface states
Topological acoustic interface states in one-dimensional (1D) acoustic topological insulators
(ATIs) are zero-dimensional (0D) topological states localized at an interface. Unlike …
(ATIs) are zero-dimensional (0D) topological states localized at an interface. Unlike …
Anomalous mobility edges in one-dimensional quasiperiodic models
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 …
particle energy spectrum of disordered systems in dimension strictly higher than two and …
Topological states protected by hidden symmetry
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 …
illuminating example is the Su-Schrieffer-Heeger (SSH) chain, whose reflection and chiral …
Equireflectionality and customized unbalanced coherent perfect absorption in asymmetric waveguide networks
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 …
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
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 …
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
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 …
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 …
of a given discrete system into an effective lower-dimensional one. We show how latent …
Negative refraction of water waves by hyperbolic metamaterials
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 …
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 …
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
We leverage quantum graph theory to quickly and accurately characterize acoustic
metamaterials comprising networks of interconnected pipes. Anisotropic bond lengths are …
metamaterials comprising networks of interconnected pipes. Anisotropic bond lengths are …