Flat bands (FB) are strictly dispersionless in the Bloch spectrum of a periodic lattice Hamiltonian, recently observed variety photonic and dissipative condensate networks. FB Hamiltonians finetuned networks, still lacking comprehensive generating principle. We introduce generator based on local network properties. classify networks through properties compact localized states (CLS) which exact eigenstates occupy $U$ unit cells. obtain complete two-parameter family two-band $d=1$ with nearest...

Abstract Layered materials such as graphite and transition metal dichalcogenides have extremely anisotropic mechanical properties owing to orders of magnitude difference between in-plane out-of-plane interatomic interaction strengths. Although effects perturbations on either intralayer or interlayer interactions been extensively investigated, mutual correlations them rarely addressed. Here, we show that layered an inevitable coupling uniaxial strain shear. Because this, the induces anomalous...

Abstract Eigenstate coalescence in non-Hermitian systems is widely observed diverse scientific domains encompassing optics and open quantum systems. Recent investigations have revealed that adiabatic encircling of exceptional points (EPs) leads to a nontrivial Berry phase addition an exchange eigenstates. Based on these phenomena, we propose this work exhaustive classification framework for EPs physical In contrast previous classifications only incorporate the eigenstate effect, our proposed...

We present first-principles calculations of elastic properties multilayered two-dimensional crystals, such as graphene, $h$-BN, and $2H\text{\ensuremath{-}}{\mathrm{MoS}}_{2}$, which show that their Poisson's ratios along the out-of-plane direction are negative, near zero, positive, respectively, spanning all possibilities for sign ratios. While in-plane positive regardless disparate electronic structural properties, characteristic interlayer interactions well layer stacking structures shown...

The moiré superlattice of misaligned atomic bilayers paves the way for designing a new class materials with wide tunability. In this work, we propose photonic analog based on dielectric resonator quasi-atoms. sharp contrast to van der Waals weak interlayer coupling, realize strong coupling regime in superlattice, characterized by cascades robust flat bands at large twist-angles. Surprisingly, find that these are non-trivial band topology, origin which is pattern arrangement. physical...

Periodically driven systems are ubiquitously found in both classical and quantum regimes. In the field of photonics, these Floquet have begun to provide insight into how time periodicity can extend concept spatially periodic photonic crystals metamaterials domain. However, despite necessity arising from presence nonreciprocal coupling between states a medium, unified non-Hermitian band structure description remains elusive. We experimentally reveal unique Bloch-Floquet non-Bloch structures...

Utilizing van der Waals heterostructure gas sensors, we measure the rectification behavior of sensitivity signal and devise a fingerprint map variation in mixture condition two different molecules.

One key to improve the performance of advanced optoelectronic devices and energy harvesting in graphene is understand predominant carrier scattering via optical phonons. Nevertheless, low light absorbance yields a limited photoexcited density, hampering hot effect, which strongly correlated phonon bottleneck effect as energy-loss channel. Here, by integrating with monolayer MoS2 possessing stronger absorbance, we demonstrate an efficient interfacial transfer between their heterostructure...

Patient's respiratory motion can significantly affect the treatment accuracy and efficiency of radiotherapy, making effective control essential. One option is gating therapy, which allows only during specific phases cycle but typically increases time. Therefore, optimizing beam-on-time (BoT) in therapy needed. This study examines BoT proton line-scanning for liver cancer patients, with aim minimizing We calculated beams 101 by using a simulated signal. was defined as ratio to total time, sum...

We report a dual resonance feature in the ballistic conductance through quantum Hall graphene nanoribbon with magnetic dot. Such dot localizes Dirac fermions exhibiting anisotropic eigenenergy spectra broken time-reversal symmetry. Interplay between localized states and edge is found to be twofold, showing Breit-Wigner Fano resonances, which reminiscent of double system. By fitting numerical results Fano-Breit-Wigner line shape from model, we demonstrate that twofold due valley mixing comes...

Abstract We study the fate of dynamical localization two quantum kicked rotors with contact interaction, which relates to experimental realizations ultra-cold atomic gases. A single rotor is known exhibit localization, takes place in momentum space. The interaction affects evolution relative k a pair interacting non-analytic way. Consequently operator U exciting large momenta amplitudes decay only as power law 1/ 4 . This contrast center-of-mass K for excited by superexponentially fast...

We investigate the optical properties of a photonic crystal (PC) composed quasi-one-dimensional flat-band lattice array through finite-difference time-domain simulations. The bands contain flat (FBs) at specific frequencies, which correspond to compact localized states as consequence destructive interference. FBs are shown be nondispersive along Г → X line, prohibiting transmission with incident light in x direction. On other hand, band for FB frequency is found dispersive Y resulting...

Image denoising is essential for removing noise in images caused by electric device malfunctions or other factors during image acquisition. It helps preserve quality and interpretation. Many convolutional autoencoder algorithms have proven effective denoising. Owing to their promising efficiency, quantum computers gained popularity. This study introduces a (QCAE) method improved was developed substituting the representative latent space of with circuit. To enhance we leveraged advantages...

We investigate the transport and dynamical properties of tunnel-coupled double charge shuttles. The oscillation frequencies two shuttles are mode locked to integer multiples applied voltage frequency $\ensuremath{\omega}$. show that left-right-symmetric may generate direct net current due bistable motions caused by parametric instability. symmetry-broken appears near $\ensuremath{\omega}={\ensuremath{\Omega}}_{0}/(2j\ensuremath{-}1)$, ($j=1,2,\dots{}$), where ${\ensuremath{\Omega}}_{0}$ is...

We investigate the interplay between quantum coherence and statistics in electrically driven nanostructures. obtain an expression for admittance current noise a nanocapacitor terms of Floquet scattering matrix derive nonequilibrium fluctuation-dissipation relation. As phase many-body correlation, has peak values whenever power shows step as function nearby gate voltage. Our theory is demonstrated by calculating double-quantum dots.

Recent research on nanomechanical resonators has shown that their mechanical motion can be controlled via the interactions between different flexural modes, in diverse structures. Strong coupling modes been attributed to strain mediation, but further study is needed harness dynamics for applications. The authors use a doubly clamped resonator demonstrate of parity, and then theory show thermomechanical amplified with high gain. This technique could useful amplifying an infinitesimal signal sensing

Significance Interactions between two adjacent surfaces of different surface orientations in a single-crystal topological insulator are investigated. We show that the edge can host nontrivial axion electrodynamics with sizeable experimental signals owing to unique interaction states. find large work function difference facets generate strong electric fields around edges and that, turn, give rise effective magnetic for given broken time-reversal symmetry. Our theoretical highlights route...

We propose a biomimetic electromechanical system mimicking auditory hair cell and investigate its mechanical properties. The biophysical properties of the biological cells, instability, sensory adaptation are modeled using feedback control. proposed shows two different types response according to their spontaneous oscillations; sinusoidal-like bistable oscillation. demonstrate by numerical simulation that, as in sensitivity is larger frequency filtering sharper for weaker force signal, which...

Abstract Non-trivial linking invariant encodes robust information of topological matter. It has been recently shown that the and winding complex eigenenergy strings can classify one-dimensional non-Hermitian However, in higher dimensions, bundles linked emerge such every string is mutually with all other strings. To best our knowledge, a Hopf bundle not experimentally clarified. Here, we attempt to explore by visualizing global structure spinor momentum space two-dimensional electric...