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Broadband non-reciprocity with robust signal integrity in a triangle-shaped nonlinear 1D metamaterial
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TLDR
In this article, a nonlinear, asymmetric, passive metamaterial that achieves giant non-reciprocity with broadband frequency operation and robust signal integrity is proposed and numerically studied.Abstract:
In this paper, we propose and numerically study a nonlinear, asymmetric, passive metamaterial that achieves giant non-reciprocity with (i) broadband frequency operation and (ii) robust signal integrity. Previous studies have shown that nonlinearity and geometric asymmetry are necessary to break reciprocity passively. Herein, we employ strongly nonlinear coupling, triangle-shaped asymmetric cell topology, and spatial periodicity to break reciprocity with minimal frequency distortion. To investigate the nonlinear band structure of this system, we propose a new representation, namely a wavenumber–frequency–amplitude band structure, where amplitude-dependent dispersion is quantitatively computed and analyzed. Additionally, we observe and document the new nonlinear phenomenon of time-delayed wave transmission, whereby wave propagation in one direction is initially impeded and resumes only after a duration delay. Based on numerical evidence, we construct a nonlinear reduced-order model (ROM) to further study this phenomenon and show that it is caused by energy accumulation, instability, and a transition between distinct branches of certain nonlinear normal modes of the ROM. The implications and possible practical applications of our findings are discussed.read more
Citations
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A fractional-order SEIHDR model for COVID-19 with inter-city networked coupling effects.
TL;DR: Results show that the proposed system with inter-city network may not be able to better describe the spread of disease in China due to the lock and isolation measures, but this may have a significant impact on countries that has no closure measures.
Journal ArticleDOI
Dark and bright soliton solutions and computational modeling of nonlinear regularized long wave model
TL;DR: In this article, the authors simulate and study dark and bright soliton solutions of 1D and 2D regularized long wave (RLW) models, and a mesh-free method based on local radial basis functions and differential quadrature technique is developed.
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Bifurcation study and pattern formation analysis of a tritrophic food chain model with group defense and Ivlev-like nonmonotonic functional response
Vikas Kumar,Nitu Kumari +1 more
TL;DR: In this paper, a tritrophic food chain model has been proposed by incorporating Ivlev-like nonmonotonic functional response, where prey is equipped with defense ability, and a detailed dynamical study and pattern formation analysis have been performed to obtain complex dynamics of the proposed system.
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Magnetically modulated sliding structure for low frequency vibration isolation
TL;DR: Magnetically modulated sliding structure (MMSS) is proposed and systematically investigated in this paper , which consists of the sliding beam and a pair of repulsive magnets, and the dynamic model of the MMSS is developed to evaluate its response when subject to base excitation.
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A new 3D multi-scroll chaotic system generated with three types of hidden attractors
TL;DR: The phase diagrams and basins of attraction are respectively used to prove that this system has multi- scroll attractors and hidden attractors, and accomplish the circuit experiment, and verify the feasibility of each case of the multi-scroll hidden attractor chaotic system.
References
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Journal ArticleDOI
Reciprocal Relations in Irreversible Processes. II.
TL;DR: In this article, a general reciprocal relation applicable to transport processes such as the conduction of heat and electricity, and diffusion, is derived from the assumption of microscopic reversibility, and certain average products of fluctuations are considered.
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Topological Photonics
Tomoki Ozawa,Hannah M. Price,Alberto Amo,Nathan Goldman,Mohammad Hafezi,Ling Lu,Mikael C. Rechtsman,David Schuster,Jonathan Simon,Oded Zilberberg,Iacopo Carusotto +10 more
TL;DR: Topological photonics is a rapidly emerging field of research in which geometrical and topological ideas are exploited to design and control the behavior of light as mentioned in this paper, which holds great promise for applications.
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Photonic Floquet topological insulators
Mikael C. Rechtsman,Julia M. Zeuner,Yonatan Plotnik,Yaakov Lumer,Daniel K. Podolsky,Felix Dreisow,Stefan Nolte,Mordechai Segev,Alexander Szameit +8 more
TL;DR: This work proposes and experimentally demonstrate a photonic topological insulator free of external fields and with scatter-free edge transport—a photonic lattice exhibiting topologically protected transport of visible light on the lattice edges.
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Controlling sound with acoustic metamaterials
TL;DR: In this article, a review of the design and properties of active acoustic metamaterials can be found, as well as an overview of future directions in the field of sound manipulation.