Camelia Prodan
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View article: Symmetry-Preserving Coupling Method for Topological Acoustic Metamaterials
Symmetry-Preserving Coupling Method for Topological Acoustic Metamaterials Open
In this paper we investigate different types of couplings used in acoustic metamaterials requiring preservation of symmetries. For testing we use the SSH model to test whether topologically edge and interface modes are supported with the d…
View article: Isolating a Single Microtubule in Nanofluidic Device
Isolating a Single Microtubule in Nanofluidic Device Open
Biological systems have been theoretically predicted to support phononic topological wave-modes, similar to the ones existing in meta-materials. The existing methods to measure these modes, however cannot be applied to biological systems; …
View article: Observation of Majorana-like bound states in metamaterial-based Kitaev chain analogs
Observation of Majorana-like bound states in metamaterial-based Kitaev chain analogs Open
We experimentally demonstrate that Majorana-like bound states (MLBSs) can occur in quasi-one-dimensional metamaterials, analogous to Majorana zero modes (MZMs) in the Kitaev chain in terms of mode spectrum and mode wave functions. In a mec…
View article: Revealing Topology in Metals using Experimental Protocols Inspired by K-Theory
Revealing Topology in Metals using Experimental Protocols Inspired by K-Theory Open
Topological metals are special conducting materials with gapless band structures and nontrivial edge-localized resonances, whose discovery has proved elusive because the traditional topological classification methods require (possibly inco…
View article: Revealing Topology in Metals using Experimental Protocols Inspired by $K$-Theory
Revealing Topology in Metals using Experimental Protocols Inspired by $K$-Theory Open
This repository contains Matlab scripts, COMSOL Multiphysics models, numerical simulation data used to generate the plots in the manuscript, and experimental measurements raw data. COMSOL models are those with the .mph extension and were c…
View article: Revealing Topology in Metals using Experimental Protocols Inspired by $K$-Theory
Revealing Topology in Metals using Experimental Protocols Inspired by $K$-Theory Open
This repository contains Matlab scripts, COMSOL Multiphysics models, numerical simulation data used to generate the plots in the manuscript, and experimental measurements raw data. COMSOL models are those with the .mph extension and were c…
View article: Revealing Topology in Metals using Experimental Protocols Inspired by $K$-Theory
Revealing Topology in Metals using Experimental Protocols Inspired by $K$-Theory Open
Topological metals are special conducting materials with gapless band structures and nontrivial edge-localized resonances, whose discovery has proved elusive because the traditional topological classification methods do not apply in this c…
View article: Topological D-Class Physics with Passive Acoustic Elements
Topological D-Class Physics with Passive Acoustic Elements Open
In this work, we supply an engineering solution that paves the way to the implementation of the full classification table of topological insulators with passive acoustic crystals. As an example, we design an acoustic crystal displaying the…
View article: Observation of Phase Controllable Majorana-like Bound States in Metamaterial-based Kitaev Chain Analogues
Observation of Phase Controllable Majorana-like Bound States in Metamaterial-based Kitaev Chain Analogues Open
We experimentally demonstrate that Majorana-like bound states (MLBSs) can occur in quasi-one-dimensional metamaterials, analogous to Majorana zero modes (MZM) in the Kitaev chain. In a mechanical spinner ladder system, we observe a topolog…
View article: Revealing the Boundary Weyl Physics of the 4D Hall Effect via Phason Engineering in Metamaterials
Revealing the Boundary Weyl Physics of the 4D Hall Effect via Phason Engineering in Metamaterials Open
Quantum Hall effect (QHE) has been theoretically predicted in 4-dimensions and higher. In hypothetical $2n$-dimensions, the topological characters of both the bulk and the boundary are manifested as quantized non-linear transport coefficie…
View article: Experimental Demonstration of Dynamic Topological Pumping across Incommensurate Bilayered Acoustic Metamaterials
Experimental Demonstration of Dynamic Topological Pumping across Incommensurate Bilayered Acoustic Metamaterials Open
A Thouless pump can be regarded as a dynamical version of the integer quantum Hall effect. In a finite-size configuration, such a topological pump displays edge modes that emerge dynamically from one bulk band and dive into the opposite bu…
View article: Observation of Flat Frequency Bands at Open Edges and Antiphase Boundary Seams in Topological Mechanical Metamaterials
Observation of Flat Frequency Bands at Open Edges and Antiphase Boundary Seams in Topological Mechanical Metamaterials Open
Motivated by the recent theoretical studies on a two-dimensional (2D) chiral Hamiltonian based on the Su-Schrieffer-Heeger chains [L. Zhu, E. Prodan, and K. H. Ahn, Phys. Rev. B 99, 041117(R) (2019)PRBMDO2469-995010.1103/PhysRevB.99.041117…
View article: Demonstration of Dynamic Topological Pumping Across Incommensurate Acoustic Meta-Crystals
Demonstration of Dynamic Topological Pumping Across Incommensurate Acoustic Meta-Crystals Open
A Thouless topological pump can be regarded as a dynamical version of the integer quantum Hall effect. In a finite configuration, a topological pump displays edge modes, which emerge dynamically from one bulk-band and dive into the opposit…
View article: Mapping the Boundary Weyl Singularity of the 4D Hall Effect via Phason Engineering in Metamaterials
Mapping the Boundary Weyl Singularity of the 4D Hall Effect via Phason Engineering in Metamaterials Open
Quantum Hall physics has been theoretically predicted in 4-dimensions and
higher. In hypothetical 2n-dimensions, the topological characters of both the
bulk and the boundary are manifested as quantized non-linear transport
coefficients tha…
View article: Observation of Hofstadter butterfly and topological edge states in reconfigurable quasi-periodic acoustic crystals
Observation of Hofstadter butterfly and topological edge states in reconfigurable quasi-periodic acoustic crystals Open
The emergence of a fractal energy spectrum is the quintessence of the interplay between two periodic parameters with incommensurate length scales. crystals can emulate such interplay and also exhibit a topological bulk-boundary corresponde…
View article: Observation of Topological Edge Modes in a Quasiperiodic Acoustic Waveguide
Observation of Topological Edge Modes in a Quasiperiodic Acoustic Waveguide Open
Topological boundary and interface modes are generated in an acoustic waveguide by simple quasiperiodic patterning of the walls. The procedure opens many topological gaps in the resonant spectrum and qualitative as well as quantitative ass…
View article: Topology of the valley-Chern effect
Topology of the valley-Chern effect Open
The quantum valley Hall effect (QVHE) has been observed in a variety of\nexperimental setups, both quantum and classical. While extremely promising for\napplications, one should be reminded that QVHE is not an exact topological\nphenomenon…