144 citations · 525 across the 23 of their papers we have counts for
15 papers · 1 filter
Paraxial wave propagation in random media with long-range correlations
Liliana Borcea, Josselin Garnier, Knut Solna
We study the paraxial wave equation with a randomly perturbed index of refraction, which can model the propagation of a wave beam in a turbulent medium. The random perturbation is…
Speckle Memory Effect in the Frequency Domain and Stability in Time-Reversal Experiments
Josselin Garnier, Knut Solna
When waves propagate through a complex medium like the turbulent atmosphere the wave field becomes incoherent and the wave intensity forms a complex speckle pattern. In this paper…
Low-frequency source imaging in an acoustic waveguide
Josselin Garnier
Time-harmonic far-field source array imaging in a two-dimensional waveguide is analyzed. A low-frequency situation is considered in which the diameter of the waveguide is slightly…
Intensity fluctuations in random waveguides
Josselin Garnier
An asymptotic analysis of wave propagation in randomly perturbed waveguides is carried out in order to identify the effective Markovian dynamics of the guided mode powers. The main…
How a moving passive observer can perceive its environment ? The Unruh effect revisited
Mathias Fink, Josselin Garnier
We consider a point-like observer that moves in a medium illuminated by noise sources with Lorentz-invariant spectrum. We show that the autocorrelation function of the signal recor…
Acoustic and geoacoustic inverse problems in randomly perturbed shallow-water environments
Laure Dumaz, Josselin Garnier, Guilhem Lepoultier
The main goal of this paper is to estimate the regional acoustic and geoacoustic shallow-water environment from data collected by a vertical hydrophone array and transmitted by dis…