Equireflectionality and customized unbalanced coherent perfect absorption in asymmetric waveguide networksWe 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 identical over a broad…Malte Röntgen, Olivier Richoux, Georgios Theocharis et al.·May 4, 2023SaveLearn
Exceptional points in single open acoustic resonator due to the symmetry breakingExceptional points (EPs) have been widely studied in quantum mechanics, condensed matter physics, optics and photonics. However, their potential in acoustics has only recently been recognized due to…Vladimir Igoshin, Mariia Tsimokha, Anastasia Nikitina et al.·May 3, 2023SaveLearn
Projective ElasticityWe present the foundations of a projective geometric theory of elasticity, as well as outline a few possible application possibilities. We give the description of the Cauchy stress and infinitesimal…Tamás Baranyai·May 2, 2023SaveLearn
Modeling the induced voltage of a disk magnet in free fallWe drop a circular disk magnet through a thin coil of wire, record the induced voltage, and compare the results to an analytic model based on the dipole approximation and Faraday's law, which…Nolan Samboy·May 2, 2023SaveLearn
On the problem of comparing graded metamaterialsWe use a simple effective model, obtained through the application of high-frequency homogenisation, to tackle the fundamental question of how the choice of gradient function affects the performance…Bryn Davies, Lili Fehértói-Nagy, Henry J. Putley·Apr 26, 2023SaveLearn
Physics-based basis functions for low-dimensional representation of the refractive index in the high energy limitThe relationship between the refractive index decrement, δ, and the real part of the atomic form factor, f, is used to derive a simple polynomial functional form for δ(E) far from the…Saransh Singh, K. Aditya Mohan·Apr 25, 2023SaveLearn
The energy equation for nonholonomic systems with nonlinear kinematic restrictions: a special category of constraintsThe main topic of this work concerns the formulation of the equations of motion and the consequent energy balance that they imply for this type of systems, In particular, the analytical development…Federico Talamucci·Apr 22, 2023SaveLearn
Classical mechanics with inequality constraintsIn this paper we discuss mechanical systems with inequality constraints. We demonstrate how such constraints can be taken into account by proper modification of the action which describes the…Andrei V. Frolov, Valeri P. Frolov·Apr 21, 2023SaveLearn
Measurement of the effects of rough surfaces on Lamb waves propagationThis work deals with the sensitivity to the plate roughness of Lamb waves. An experimental study is performed involving an air-coupling transducer system. Signal processing allows us to extract the…Damien Leduc, Bruno Morvan, Pascal Pareige et al.·Apr 19, 2023SaveLearn
Has the problem of the motion of a heavy symmetric top been solved in quadratures?We have revised the problem of the motion of a heavy symmetric top. When formulating equations of the Lagrange top with the diagonal inertia tensor, the potential energy has more complicated form as…Alexei A. Deriglazov·Apr 17, 2023SaveLearn
Rectangular empty waveguide transition for realizing an electromagnetic jet based measuring deviceSpheres, cylinders, cones, cuboids have been used in the literature to generate photonic jets at the back of these structures when illuminated by plane waves. We are working on the generalization…Antoine Deubaibe, Salvador Ndouwe, Baraka Mahamout Mahamat et al.·Apr 7, 2023SaveLearn
Time-modulated inerters as building blocks for nonreciprocal mechanical devicesIn this work, we discuss the realization of mechanical devices with non-reciprocal attributes enabled by inertia-amplifying, time-modulated mechanisms. Our fundamental building-block features a mass,…Paolo Celli, Antonio Palermo·Apr 6, 2023SaveLearn
The strange case of Negative ReflectionIn this paper we show for the first time the phenomenon of negative reflection in a simple mechanical structure. The latter is a grating of fixed inclusions embedded in a linear elastic matrix.…Bibinur Meirbekova, Lorenzo Morini, Michele Brun et al.·Apr 1, 2023SaveLearn
Even and odd self-similar solutions of the diffusion equation for infinite horizonIn the description of transport phenomena an important aspect represents the diffusion. In certain cases the diffusion may appear together with convection. In this paper we study the diffusion…L. Mátyás, I. F. Barna·Mar 31, 2023SaveLearn
Symmetries of many-body systems imply distance-dependent potentialsConsidering interatomic potential U( q) where q = [ q1, q2, …, qN] ∈ R3N is a vector describing positions, $qi ∈…Jonathan Utterson, Radek Erban·Mar 31, 2023SaveLearn
Loss compensation and super-resolution with excitations at complex frequenciesAbbe diffraction limit fundamentally bounds the resolution of conventional optical imaging and spectroscopic systems. Along the years, several schemes have been introduced to overcome this limit,…Seunghwi Kim, Yu-Gui Peng, Simon Yves et al.·Mar 30, 2023SaveLearn
Higher-order exceptional points in loss-free waveguide arrays with negative-index materialsNegative-index materials (NIMs) are shown to support optical anti-parity-time (anti-PT) symmetry even when they are lossless. Here we prove the feasibility in achieving higher-order exceptional…Xin-Zhe Zhang, Li-Ting Wu, Ru-Zhi Luo et al.·Mar 28, 2023SaveLearn
Reply to the comment on the letter "Geometric Origin of the Tennis Racket Effect"The author of the comment~[arXiv:2302.04190] criticizes our published results in Phys. Rev. Lett. 125, 064301 (2020) about the Tennis Racket Effect (TRE). The TRE is a geometric effect which…P. Mardesic, G. J. Gutierrez Guillen, D. Sugny·Mar 27, 2023SaveLearn
What is a degree of freedom? Configuration spaces and their topologyUnderstanding degrees of freedom in classical mechanics is fundamental to characterizing physical systems. Counting them is usually easy, especially if we can assign them a clear meaning. However,…Juan Margalef-Bentabol, Leigh Herman, Ivan Booth·Mar 23, 2023SaveLearn
Overcoming losses in superlenses with synthetic waves of complex frequencySuperlenses made of plasmonic materials and metamaterials have been exploited to image features of sub-diffractional scale. However, their intrinsic losses impose a serious restriction on the imaging…Fuxin Guan, Kebo Zeng, Zhaoyu Nie et al.·Mar 22, 2023SaveLearn
Noether's theorem and Lie symmetries for time-dependent Hamilton-Lagrange systemsNoether and Lie symmetry analyses based on point transformations that depend on time and spatial coordinates will be reviewed for a general class of time-dependent Hamiltonian systems. The resulting…Jürgen Struckmeier, Claus Riedel·Mar 22, 2023SaveLearn
Invariants for time-dependent Hamiltonian systemsAn exact invariant is derived for n-degree-of-freedom Hamiltonian systems with general time-dependent potentials. The invariant is worked out in two equivalent ways. In the first approach, we…Jürgen Struckmeier, Claus Riedel·Mar 22, 2023SaveLearn
Comment on the elastica section in Thorne and Blandford "Modern Classical Physics", the shape of things, and the aspect ratio of realityI point out and diagnose an error in a figure in a textbook on classical physics. The error helps to illustrate a pitfall encountered when dealing with the shapes of objects, and perhaps also…J. A. Hanna·Mar 22, 2023SaveLearn
Coupling Analysis of the Surface States in Periodic Microwave Transmission LineThe spectrum of electromagnetic waves in periodic linear structures, such as periodic waveguides or chains of microelements i.e. spheres, cavities, exhibit the sequence of stop bands for propagating…L. Ivzhenko, A. Girich, M. Baranowski et al.·Mar 20, 2023SaveLearn
The jump effect of a general eccentric cylinder rolling on a rampInteresting phenomena occur when an eccentric rigid body rolls on an inclined or horizontal plane. For example, a variety of motions between rolling and sliding are exhibited until suddenly a jump…E. Aldo Arroyo, M. Aparicio Alcalde·Mar 16, 2023SaveLearn