Article
Engineering, Chemical
Hrachya Kocharyan, Nikhil Karanjgaokar
Summary: The study found that the drag effects on 2D granular crystals immersed in various fluids result in higher wave attenuation, with the coefficient of attenuation increasing with viscosity but unexpectedly decreasing in the highest viscosity fluids. Additionally, the ratio of kinetic energy to strain energy for immersed granular crystals initially decreases with viscosity but increases again for the fluids with the highest viscosities.
Article
Geochemistry & Geophysics
Lin Zhang, Jing Ba, Jose M. Carcione
Summary: The theory developed in this study describes wave propagation in porous media with inclusions at multiple scales, derived from differential effective medium theory and Biot-Rayleigh theory for double-porosity media. The theory determines generalized stiffness and density coefficients based on the first principles of strain, kinetic, and dissipation energies, showing that anelasticity depends on various factors such as inclusion size, distribution parameter, mean radius, and variance. Experimental results confirm the model's validity in describing anelasticity observed in laboratory and field measurements.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Biology
Hugh Z. Ford, Angelika Manhart, Jonathan R. Chubb
Summary: Cells relay signals to transmit information across tissues. However, the mechanisms for generating the coding features of signal relay are poorly understood. Using the periodic cAMP wave system, we found that migration is triggered by an increase in wave frequency generated at the signalling centre. This wave frequency is regulated by cAMP wave circulation, which organises the long-range signal.
Article
Multidisciplinary Sciences
Shubhankar Das, A. Ross, X. X. Ma, S. Becker, C. Schmitt, F. van Duijn, E. F. Galindez-Ruales, F. Fuhrmann, M-A Syskaki, U. Ebels, V Baltz, A-L Barra, H. Y. Chen, G. Jakob, S. X. Cao, J. Sinova, O. Gomonay, R. Lebrun, M. Klaui
Summary: The research shows that there is a mechanism for long-distance spin transport in the antiferromagnetic orthoferrite YFeO3, with a magnon decay length exceeding hundreds of nanometers and low magnetic damping. The strong anisotropy in magnon decay lengths is attributed to the role of magnon group velocity in the transport of spin-waves.
NATURE COMMUNICATIONS
(2022)
Article
Physics, Multidisciplinary
Archak Purkayastha, Madhumita Saha, Bijay Kumar Agarwalla
Summary: This study reveals that a one-dimensional ordered fermionic lattice system connected to two baths with different chemical potentials at zero temperature exhibits two phases of subdiffusive conductance scaling with system size, unlike the perfectly ballistic transport in the isolated system. Interestingly, there are two chemical-potential-driven subdiffusive to ballistic phase transitions at zero temperature in the open system scenario.
PHYSICAL REVIEW LETTERS
(2021)
Article
Environmental Sciences
Jie Li, Bingzhe Dai, Jiahao Zhou, Junchao Zhang, Qilin Zhang, Jing Yang, Yao Wang, Jiaying Gu, Wenhao Hou, Bin Zou, Jing Li
Summary: The equivalent propagation method with variable speed was used in a long-range lightning location network in China. By comparing with the ADTD lightning locating system, the feasibility of this method was initially verified. The long-range lightning location network showed improved detection efficiency, location accuracy, and detection range.
Article
Mathematics, Interdisciplinary Applications
Christophe Gomez
Summary: This work focuses on the analysis of high-frequency wave propagation in randomly layered media. The research reveals the impact of slow decay of correlations on pulse propagation and describes the solution for deterministic pulse deformation. The mathematical analysis is based on an approximation-diffusion theorem for random ordinary differential equations.
MULTISCALE MODELING & SIMULATION
(2023)
Article
Physics, Multidisciplinary
A. G. Catalano, F. Mattiotti, J. Dubail, D. Hagenmuller, T. Prosen, F. Franchini, G. Pupillo
Summary: In this study, we analyze the exciton propagation in a d-dimensional lattice with power-law hopping cc 1/ra and dephasing. We find that in the strong dephasing regime, the dynamics can be described by a classical master equation for an exclusion process with long jumps. The spatial distribution of the exciton changes at a critical value of the decay exponent, and it exhibits anomalous diffusion behavior.
PHYSICAL REVIEW LETTERS
(2023)
Article
Environmental Sciences
Junchao Zhang, Jiahao Zhou, Jie Li, Jiaying Gu, Qilin Zhang, Bingzhe Dai, Yao Wang, Jialei Wang, Yuqing Zhong, Qingda Li
Summary: This paper presents a method to improve the location accuracy of the long-range lightning detection network in China by compensating for the peak time delay of the ground wave. The results show significant improvements in accuracy and offsets compared to the Advanced Direction Time Lightning Detection System (ADTD).
Article
Physics, Multidisciplinary
Guido Giachetti, Nicolo Defenu, Stefano Ruffo, Andrea Trombettoni
Summary: The article discusses the effect of long-range decaying couplings on the BKT transition, revealing a phase diagram far richer than the short-range scenario, with a quasiordered phase existing between a symmetry broken phase and a disordered phase.
PHYSICAL REVIEW LETTERS
(2021)
Article
Materials Science, Multidisciplinary
M. Mierzejewski, J. Wronowicz, J. Pawlowski, J. Herbrych
Summary: By numerically studying the Heisenberg chain with power-law exchange, we find that for spin anisotropy Delta similar or equal to exp(-alpha + 2), the system exhibits quasiballistic spin transport and long-lasting fermionic excitation. This conclusion is reached through analysis of spin domains dynamics, dynamical spin conductivity, matrix elements of spin-current operator, and conserved operators. Our results establish a smooth connection between two models with fully ballistic transport: free particles with nearest-neighbor hopping and the isotropic Haldane-Shastry model.
Article
Materials Science, Multidisciplinary
J. T. Schneider, S. J. Thomson, L. Sanchez-Palencia
Summary: Entanglement is a central feature in many-body quantum systems, especially in quantum phase transitions. In this study, we investigate the entanglement spectrum of the long-range XXZ model and find remarkable self-similarity within the critical phase. Our results confirm the predictions of renormalization group theory and provide insights into the quantum phase diagram of the model.
Article
Neurosciences
Alex T. L. Leong, Xunda Wang, Eddie C. Wong, Celia M. Dong, Ed X. Wu
Summary: The study uncovered the propagation pathways of neural signals in the brain using optogenetics and functional MRI, showing that such propagation can modulate sensory functions. The research indicated that the temporal characteristics of neural activity play a crucial role in determining the pathways of neural signal propagation.
Article
Acoustics
Michael Oberguggenberger, Martin Schwarz
Summary: This paper introduces a new method for modeling wave propagation in random, linearly elastic materials using Fourier integral operators (FIOs). The FIO representation can identify elastic parameters and statistical hyperparameters, as well as be used for damage detection. Hypothesis tests proposed in the paper can distinguish between undamaged and damaged materials even in the presence of random material parameters. Theoretical fundamentals and a numerical experiment are presented to demonstrate the applicability of the proposed method.
JOURNAL OF SOUND AND VIBRATION
(2021)
Article
Physics, Multidisciplinary
Florian Kranzl, Stefan Birnkammer, Manoj K. Joshi, Alvise Bastianello, Rainer Blatt, Michael Knap, Christian F. Roos
Summary: In recent years, coherent, time-periodic modulation has been used to realize novel Hamiltonians, known as Floquet engineering. By applying this approach, we successfully demonstrated a long-ranged, anisotropic Heisenberg model with tunable interactions in a trapped ion quantum simulator. Our results showed the existence of composite magnon bound states in the model, which had nondiverging group velocity under sufficiently strong interactions. We also observed the implications of bound-state formation on the entanglement dynamics of the system.
