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Wave propagation in random media: beyond Gaussian statistics [PDF]
ESAIM: Proceedings and Surveys, 2023 In this paper we review some aspects of wave propagation in random media. In the physics literature the picture seems simple: for large propagation distances, the wavefield has Gaussian statistics, mean zero, and second-order moments determined by ...
Garnier Josselin
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The behavior of partially coherent twisted space-time beams in atmospheric turbulence
Frontiers in Physics, 2023 We study how atmospheric turbulence affects twisted space-time beams, which are non-stationary random optical fields whose space and time dimensions are coupled with a stochastic twist.
Milo W. Hyde IV
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Effective waves for random three-dimensional particulate materials
New Journal of Physics, 2021 How do you take a reliable measurement of a material whose microstructure is random? When using wave scattering, the answer is often to take an ensemble average (average over time or space).
Artur L Gower, Gerhard Kristensson
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Physics-Based Coherent Modeling of Long-Range Millimeter-Wave Propagation and Scattering in Rain
IEEE Open Journal of Antennas and Propagation, 2023 Precipitation and in particular rain present a random medium with constituent particles having dimensions comparable to the wavelength at millimeter-wave frequencies.
Behzad Yektakhah, Kamal Sarabandi
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Advanced Electronic Materials, 2023 Random granular media can exhibit characteristics that are often related to ordered media. In the present work, this feature is observed in the polarized Second Harmonic Generation (SHG) response from reduced iron‐doped lithium niobate (LN:Fe) powders ...
Mónica J. García‐Rodríguez +8 more
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Applied Sciences, 2021 In this study, the problem of the influence of a horizontally inhomogeneous liquid bottom impedance, given by random Gaussian function of the speed of sound and by density, on the propagation of low-frequency sound in a shallow-water waveguide is ...
Fengqin Zhu +2 more
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Acoustic Wave Correlation Tomography of Time-Varying Disordered Structures
Archives of Acoustics, 2018 An original model based on first principles is constructed for the temporal correlation of acoustic waves propagating in random scattering media. The model describes the dynamics of wave fields in a previously unexplored, moderately strong (mesoscopic ...
Gregory SAMELSOHN, Saad TAPUCHI
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3D MORPHOLOGICAL MODELLING OF A RANDOM FIBROUS NETWORK
Image Analysis and Stereology, 2011 In the framework of the Silent Wall ANR project, the CMM and the US2B are associated in order to characterize and to model fibrous media studying 3D images acquired with an X-Ray tomograph used by the US2B.
Charles Peyrega +3 more
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Discrete-Time Semi-Markov Random Evolutions in Asymptotic Reduced Random Media with Applications
Mathematics, 2020 This paper deals with discrete-time semi-Markov random evolutions (DTSMRE) in reduced random media. The reduction can be done for ergodic and non ergodic media.
Nikolaos Limnios, Anatoliy Swishchuk
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Random walks in disordered lattice, CTRW, memory and dipole transport [PDF]
Magnetic Resonance in Solids, 2017 Application of CTRW (continuous time random walks) to dipole hopping transport is reviewed. Conditions of applicability of basic kinetic equations to spin systems are indicated.
F.S. Dzheparov
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