A5032627721- Topological Materials and Phenomena
- Engineering and Materials Science Studies
- Quantum and electron transport phenomena
- Graphene research and applications
- Mechanical and Optical Resonators
- Nonlinear Photonic Systems
- Terahertz technology and applications
- Neural Networks and Reservoir Computing
- Noncommutative and Quantum Gravity Theories
- Quantum many-body systems
- Random lasers and scattering media
- Quantum Mechanics and Non-Hermitian Physics
- Quantum chaos and dynamical systems
- Photonic Crystals and Applications
- Photonic and Optical Devices
- Quantum optics and atomic interactions
- Photorefractive and Nonlinear Optics
- Electrostatics and Colloid Interactions
- Cellular Automata and Applications
- Advanced Fiber Laser Technologies
- Slime Mold and Myxomycetes Research
- Experimental and Theoretical Physics Studies
- Black Holes and Theoretical Physics
- Quantum and Classical Electrodynamics
- Quasicrystal Structures and Properties
University of Würzburg
2022-2024
University of Konstanz
2023-2024
Laboratoire de Physique de l'ENS de Lyon
2020
École Normale Supérieure de Lyon
2020
Université Claude Bernard Lyon 1
2020
Centre National de la Recherche Scientifique
2020
University of Oulu
2019
The Laplace operator encodes the behavior of physical systems at vastly different scales, describing heat flow, fluids, as well electric, gravitational, and quantum fields. A key input for equation is curvature space. Here we discuss experimentally demonstrate that spectral ordering Laplacian eigenstates hyperbolic (negatively curved) flat two-dimensional spaces has a universally structure. We use lattice regularization space in an electric-circuit network to measure 'hyperbolic drum',...
Abstract Curved spaces play a fundamental role in many areas of modern physics, from cosmological length scales to subatomic structures related quantum information and gravity. In tabletop experiments, negatively curved can be simulated with hyperbolic lattices. Here we introduce experimentally realize matter as paradigm for topological states through topolectrical circuit networks relying on complex-phase element. The experiment is based band theory that confirm here an unprecedented...
Motivated by recent realizations of hyperbolic lattices in superconducting waveguides and electric circuits, we compute the Hofstadter butterfly on regular tilings. Utilizing large with periodic boundary conditions, obtain true bulk spectrum unaffected states. The extended gapped regions prevails, its shape is universally determined fundamental tile, while fractal structure lost. We explain how these features originate from Landau levels space can be verified experimentally.
We observe a localized cnoidal (LCn) state in an electric circuit network. Its formation derives from the interplay of non-linearity and topology inherent to Su-Schrieffer-Heeger (SSH) chain inductors. Varicap diodes act as voltage-dependent capacitors, create non-linear on-site potential. For sinusoidal voltage excitation around midgap frequency, we show that response SSH follows Korteweg-de Vries equation. The topological boundary which relates impedance peak linearized limit is distorted...
Quantized adiabatic transport can occur when a system is slowly modulated over time. In most realizations, however, the efficiency of such reduced by unwanted dissipation, back-scattering, and nonadiabatic effects. this paper, we realize topological pump in an electrical circuit network that supports remarkably stable long-lasting pumping voltage signal. We further characterize topology our deducing Chern number from measured edge band structure. To achieve this, experimental setup makes use...
The engineering of synthetic materials characterized by more than one class topological invariants is the current challenges solid-state based and materials. Using a photonic lattice implemented in two-coupled ring system we engineer an anomalous Floquet metal that gapless bulk shows simultaneously two different properties. On hand, this presents bands winding number. emerges from breakup inversion symmetry, it directly relates to appearance Bloch suboscillations within its bulk. other...
We report new oscillations of wave packets in quantum walks subjected to electric fields, that decorate the usual Bloch-Zener insulators. The number turning points (or suboscillations) within one Bloch period these is found be governed by winding quasienergy spectrum. Thus, this provides a physical manifestation topological property periodically driven systems can probed experimentally. Our model, based on an oriented scattering network, readily implementable photonic and cold atomic setups.
We propose a mechanism to engineer chiral spectral flow of interface states in gapless semimetallic system. Although the topological indices bands (Chern numbers) remain ill-defined, owing existence bulk band touching points, this has origin that makes it robust even when coexists with bands. These between two Dirac semimetals generalize usual ones appearing topologically distinct insulators. This phenomenon is illustrated an adiabatically modulated photonic quantum walk.
We observe a localized cnoidal (LCn) state in an electric circuit network. Its formation derives from the interplay of non-linearity and topology inherent to Su-Schrieffer-Heeger (SSH) chain inductors. Varicap diodes act as voltage-dependent capacitors, create non-linear on-site potential. For sinusoidal voltage excitation around midgap frequency, we show that response SSH follows Korteweg-de Vries equation. The topological boundary which relates impedance peak linearized limit is distorted...
We propose a generic scattering matrix model implementable in photonics to engineer new Floquet metallic phase that combines two distinct topological properties: the winding of bulk bands and existence robust chiral edge states. The gives rise wavepacket oscillations real space while conserving its initial momentum. Our findings open way study class systems.
Curved spaces play a fundamental role in many areas of modern physics, from cosmological length scales to subatomic structures related quantum information and gravity. In tabletop experiments, negatively curved can be simulated with hyperbolic lattices. Here we introduce experimentally realize matter as paradigm for topological states through topolectrical circuit networks relying on complex-phase element. The experiment is based band theory that confirm here an unprecedented numerical...
Quantized adiabatic transport can occur when a system is slowly modulated over time. In most realizations however, the efficiency of such reduced by unwanted dissipation, back-scattering, and non-adiabatic effects. this work, we realize topological pump in an electrical circuit network that supports remarkably stable long-lasting pumping voltage signal. We further characterize topology our deducing Chern number from measured edge band structure. To achieve this, experimental setup makes use...
We propose a 2D oriented scattering model for Floquet periodically driven system and show the presence of new kind edge states which exist along with full gapless bulk states. refer to such regime as topological metal.