Article
Thermodynamics
Kazuma Hirasawa, Iona Nakami, Takumi Ooinoue, Tatsunori Asaoka, Garuda Fujii
Summary: Recent developments in information science have led to innovative advances in thermal flow manipulation. Topology optimization plays a crucial role in designing thermal metastructures, and the experimental results have shown comparable performance to numerical simulations.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Engineering, Mechanical
Yong Zhang, Marcel Tichem, Fred van Keulen
Summary: This paper explores the rotational properties of multi-stable metastructures, finding that rotational stability is influenced by h/L and t/L values, and the theoretical analysis aligns well with experimental and simulation results in predicting rotational snap-through transitions.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Engineering, Electrical & Electronic
Zahra Eyni, Karim Milanchian
Summary: The optical properties of quasiperiodic structures with graphene-based hyperbolic metamaterial were studied in the THz region. These structures exhibited band gaps in both the hyperbolic and elliptical frequency regions. The effects of the hyperbolic metamaterial layers, optical axis orientation, and graphene surface conductivity on transmission and absorption properties were discussed. The results suggest potential applications in designing controllable terahertz polarizers or filters.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Optics
Francesco S. Piccioli, Alexander Szameit, Iacopo Carusotto
Summary: A synthetic frequency dimension scheme is proposed to control the spectrum of a light beam through acousto-optical effect, enabling robust manipulation of the spectrum without relying on high-Q cavity modes.
Article
Physics, Multidisciplinary
Tian Tian, Yichuan Zhang, Liang Zhang, Longhao Wu, Shaochun Lin, Jingwei Zhou, Chang-Kui Duan, Jian-Hua Jiang, Jiangfeng Du
Summary: In this study, robust unidirectional adiabatic pumping of phonons was achieved in a parametrically coupled nanomechanical system. By utilizing nearly degenerate local modes and their dynamic modulation, nonreciprocal transfer of phononic excitations from one edge to the other was achieved with near unit fidelity. This experiment paves the way for nonreciprocal phonon dynamics via adiabatic pumping and has significant implications for phononic quantum information processing.
PHYSICAL REVIEW LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Jerome Lloyd, Sounak Biswas, Steven H. Simon, S. A. Parameswaran, Felix Flicker
Summary: This study investigates classical dimers on two-dimensional quasiperiodic Ammann-Beenker tilings and identifies novel structures that exhibit collective correlations at different scales.
Article
Engineering, Multidisciplinary
Weichen Li, Yingqi Jia, Fengwen Wang, Ole Sigmund, Xiaojia Shelly Zhang
Summary: This study systematically investigates several precisely programmed nonlinear extreme responses in 3D structures under finite deformations through multimaterial inverse design by topology optimization. Unique complex 3D geometries with deformation capabilities are discovered and utilized to deliver the target responses. The optimized structure is accurately fabricated through a proposed hybrid fabrication method and the design's programmed behavior is validated.
INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE
(2023)
Article
Engineering, Mechanical
Shantanu H. Chavan, Satya Sarvani Malladi, Vijaya V. N. Sriram Malladi
Summary: Meta-structures with dynamic vibrational resonators are used to control wave propagation and attenuate vibrations over a broadband frequency spectrum. A novel approach is presented to adaptively program bandgaps of a 1D flexural meta-structure, using DVRs with two stable configurations. The proposed method is validated through numerical modeling and experimental investigation.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Quantum Science & Technology
C. Martinez-Strasser, M. A. J. Herrera, A. Garcia-Etxarri, G. Palumbo, F. K. Kunst, D. Bercioux
Summary: The spectral properties of two possible non-Hermitian diamond chains with a flat band in the band structure, namely dimerized diamond chains, are investigated in this study. The systems are characterized using biorthogonal polarization and quantum metric, and the presence of non-Hermitian skin effect is observed. The study also shows the equivalence between the two non-Hermitian diamond chains and the non-Hermitian Su-Schrieffer-Heeger chains after a unitary rotation.
ADVANCED QUANTUM TECHNOLOGIES
(2023)
Article
Multidisciplinary Sciences
Zacharias Vangelatos, Haris Moazam Sheikh, Philip S. Marcus, Costas P. Grigoropoulos, Victor Z. Lopez, George Flamourakis, Maria Farsari
Summary: The study explored the use of a Bayesian optimization framework with evolutionary Monte Carlo sampling to systematically design defect arrangements in a structured microlattice. The proposed algorithm efficiently found the global optimum in a large design space, resulting in a normalized strain energy density significantly higher than its defect-free counterpart. Traditional optimization methods were deemed inefficient for this specific microlattice design.
Article
Multidisciplinary Sciences
Dagur I. Albertsson, Ana Rusu
Summary: This work explores the possibility of implementing highly reconfigurable oscillator-based Ising Machines (IMs). A implementation based on quasiperiodically modulated coupling strength through a common medium is proposed and its potential is demonstrated through numerical simulations. Moreover, a proof-of-concept implementation based on CMOS coupled ring oscillators is proposed and its functionality is demonstrated.
SCIENTIFIC REPORTS
(2023)
Article
Multidisciplinary Sciences
Keith Malcolm Smith
Summary: The theory proposes that link probability in networks is modeled by node fitness and similarity factors, with links emerging due to individualistic and dyadic information. Modeling based on this theory outperforms existing explanations across 110 networks, with degree distributions resembling power-laws at low densities and log-normal distributions at higher densities. Validation through inversion approach on economic and fMRI networks results in geometrically aligned nearest neighbor networks, supporting the theory.
SCIENTIFIC REPORTS
(2021)
Article
Automation & Control Systems
Ming Chi, Qihao Hu, Jiahao Zhang, Zhi-Wei Liu
Summary: This paper studies the asynchronous consensus problems of second-order multi-agent systems with aperiodic communication. An asynchronous pulse-modulated intermittent control method is proposed to overcome the waiting problem caused by synchronous state updates in existing systems. By constructing a time-varying discrete system to describe the evolution of sample values and analyzing the properties of stochastic and Laplace matrices, effective conditions are obtained to describe the relationship between the convergence of controlled systems and control parameters. Finally, a 300-node multi-agent system with a random geographic network is used to verify the feasibility of the proposed control and the correctness of the theoretical analysis.
JOURNAL OF THE FRANKLIN INSTITUTE-ENGINEERING AND APPLIED MATHEMATICS
(2023)
Article
Crystallography
Ekaterina Marchenko, Sergey A. Fateev, Eugene A. Goodilin, Alexey B. Tarasov
Summary: The unprecedented structural flexibility and useful optoelectronic properties of hybrid halide perovskites have sparked high interest. However, there is a lack of systematic studies on the relationships between the topology of 1D hybrid halide perovskite-derived structures and their optoelectronic properties. This work introduces a rational classification of 1D hybrid lead iodide structures and shows that the distortions of PbI6 octahedral chains are the main parameters affecting the band gap, while the distance between the chains has a minor effect.
Article
Chemistry, Multidisciplinary
Sharon Rechnitz, Tal Tabachnik, Shlomo Shlafman, Michael Shlafman, Yuval E. Yaish
Summary: This article addresses the characteristics and phenomena of bistable resonators based on carbon nanotubes, finding inaccuracies in the common approach to calculating vibrational resonance amplitude and studying the latching phenomenon and inner shell sliding.
Article
Physics, Multidisciplinary
Yiwei Xia, Emanuele Riva, Matheus I. N. Rosa, Gabriele Cazzulani, Alper Erturk, Francesco Braghin, Massimo Ruzzene
Summary: The experimental demonstration shows temporal pumping of elastic waves in an electromechanical waveguide, enabling the generation and control of edge states through temporal modulation of stiffness. The framework allows for controllable transfer of edge states from one boundary to the other, opening up new avenues for information manipulation and transport through elastic waves. This study also explores higher-dimensional topological physics using virtual dimensions mapped to time in electromechanical systems.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Applied
Danilo Braghini, Luis G. G. Villani, Matheus I. N. Rosa, Jose R. de F. Arruda
Summary: This work investigates non-Hermitian elastic waveguides with periodically applied proportional feedback efforts, showing non-reciprocal frequency components in dispersion diagrams and the effects of feedback sign and locality on wave propagation. The results contribute to designing metamaterials with novel properties and potential technological applications.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Engineering, Mechanical
Danilo Beli, Matheus Inguaggiato Nora Rosa, Carlos De Marqui Jr, Massimo Ruzzene
Summary: Periodic configurations have dominated the design of phononic and elastic-acoustic metamaterial structures. Quasicrystals lack translational symmetry but have unrestricted rotational symmetries, leading to unexplored mechanical and dynamic properties. Higher order symmetries in quasicrystals allow for high equivalent stiffness characteristics and nearly isotropic wave propagation, with potential for novel material designs.
EXTREME MECHANICS LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Yuning Guo, Matheus Inguaggiato Nora Rosa, Mohit Gupta, Benjamin Emerson Dolan, Brandon Fields, Lorenzo Valdevit, Massimo Ruzzene
Summary: This study demonstrates how dynamic functionalities can be added to materials based on minimal surface geometries through topological guiding of elastic waves at interfaces. By modifying the geometric parametrizations, topologically non-trivial interfaces are formed to support localized vibrational modes and robust propagation of elastic waves.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Simon Yves, Matheus Inguaggiato Nora Rosa, Yuning Guo, Mohit Gupta, Massimo Ruzzene, Andrea Alu
Summary: The twist angle between stacked 2D materials has been shown to control various phenomena, such as superconductivity and topological phases. However, these discoveries have been limited to atomically thin systems and photonic systems. This work demonstrates the application of twistronics in a macroscopic elastic metasurface made of LEGO pillar resonators, allowing for highly tailored anisotropy and strong tunability of waves. The findings show the potential for observing extreme phenomena in a variety of wave systems without the need for multilayered fabrication.
Article
Multidisciplinary Sciences
Yuning Guo, Baowen Li, Xiaobo Yin
Summary: This study proposes a dual-compressed photoacoustic imaging method with single-pixel detection, which enables high-efficiency surface tomography with 3D spatial resolution unlimited by the acoustics, revealing the potential for dynamic imaging in a scattering medium.
NATIONAL SCIENCE REVIEW
(2023)
Article
Physics, Multidisciplinary
Matheus I. N. Rosa, Massimo Ruzzene
Summary: This paper investigates the dynamic behavior of lattices with disorder introduced through non-local network connections. The study reveals the emergence of spectral gaps in the lattice for increasing levels of disorder, leading to low transmission levels of vibrations. It is also found that the disordered lattices undergo transitions from ballistic to super-diffusive or diffusive transport. These findings demonstrate the potential for disorder in the form of non-local connections to enable additional functionalities for metamaterials.
NEW JOURNAL OF PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Yuning Guo, Matheus I. N. Rosa, Massimo Ruzzene
Summary: The acoustic properties of an acoustic crystal consisting of acoustic channels designed according to the gyroid minimal surface embedded in a 3D rigid material are investigated. The resulting gyroid acoustic crystal is characterized by a spin-1 Weyl and a charge-2 Dirac degenerate points that are enforced by its nonsymmorphic symmetry. The non-trivial topology of the acoustic dispersion produces chiral surface states with open arcs, which manifest themselves as waves whose propagation is highly directional and remains confined to the surfaces of a 3D material. Surface arc states have been experimentally validated and negative refraction has been observed. These findings shed light on nontrivial bulk and edge physics in symmetry-based compact continuum materials.
Article
Physics, Multidisciplinary
Matheus I. N. Rosa, Michael J. Leamy, Massimo Ruzzene
Summary: We investigate the spectral properties of one-dimensional spatially modulated nonlinear phononic lattices and their evolution as a function of amplitude. In the linear regime, the stiffness modulations define periodic and quasiperiodic lattices with topological edge states in the bandgaps. With cubic nonlinearities, we observe that edge states within the gap and with increasing amplitude remain localized, while edge states approaching the bulk bands experience delocalization transitions. The predicted transitions are independent of lattice size and are present in both periodic and quasiperiodic lattices, highlighting the coexistence of topological edge states and discrete breathers.
NEW JOURNAL OF PHYSICS
(2023)
Article
Physics, Multidisciplinary
Danilo Beli, Matheus Inguaggiato Nora Rosa, Carlos De Marqui Jr, Massimo Ruzzene
Summary: In this paper, evidence of directional wave behavior along high-order rotational symmetries of quasicrystalline elastic metamaterial plates is presented. The dispersion properties of the waves propagating in the plates are estimated through Fourier transformation of transient wave fields. Specific directional behavior, such as wave beaming and diffraction, is showcased at identified frequency bands. This paper expands the understanding of wave directionality phenomena and opens possibilities for applications involving high-order wave features of quasicrystals.
PHYSICAL REVIEW RESEARCH
(2022)
