Zobrazeno 1 - 10
of 267
pro vyhledávání: '"Genack, A. Z."'
The quantum conductance and its classical wave analogue, the transmittance, are given by the sum of the eigenvalues of the transmission matrix. The lowest transmission eigenvalue in diffusive media might be expected to play a negligible role in the c
Externí odkaz:
http://arxiv.org/abs/2406.05112
The diffusion model is used to calculate the time-averaged flow of particles in stochastic media and the propagation of waves averaged over ensembles of disordered static configurations. For classical waves exciting static disordered samples, such as
Externí odkaz:
http://arxiv.org/abs/2401.04818
Publikováno v:
Waves in Random and Complex Media, 2024
The statistics of transmission through random 1D media are generally presumed to be universal and to depend only upon a single dimensionless parameter-the ratio of the sample length and the mean free path, s = L/l. Here, we show in numerical simulati
Externí odkaz:
http://arxiv.org/abs/2211.02532
Publikováno v:
Physical Review B 104, 104204 (2021)
We show in random matrix theory, microwave measurements, and computer simulations that the mean free path of a random medium and the strength and position of an embedded reflector can be determined from radiation scattered by the system. The mean fre
Externí odkaz:
http://arxiv.org/abs/2109.11922
Dynamic and steady state aspects of wave propagation are deeply connected in lossless open systems in which the scattering matrix is unitary. There is then an equivalence among the energy excited within the medium, the Wigner time delay, and the dens
Externí odkaz:
http://arxiv.org/abs/2106.12640
Publikováno v:
L. A. Razo-L\'opez, A. Z. Genack, and V. A. Gopar, Statistics of coherent waves inside media with L\'evy disorder, Phys. Rev. Res. 3, 023035 (2021)
Structures with heavy-tailed distributions of disorder occur widely in nature. The evolution of such systems, as in foraging for food or the occurrence of earthquakes is generally analyzed in terms of an incoherent series of events. But the study of
Externí odkaz:
http://arxiv.org/abs/2102.05423
Publikováno v:
Phys. Rev. A 103, 033507 (2021)
Here we show in simulations of the Haldane model that pulse propagation in disordered topological insulators is robust throughout the central portion of the band gap where localized modes do not arise. Since transmission is robust in topological insu
Externí odkaz:
http://arxiv.org/abs/2012.14608
Autor:
Kang, Yuhao, Genack, Azriel Z.
Publikováno v:
Phys. Rev. B 103, 100201 (2021)
Understanding vanishing transmission in Fano resonances in quantum systems and metamaterials, and ultralow transmission in disordered media is key to elucidating optical interactions. Using analytic theory and numerical simulations, we discover the t
Externí odkaz:
http://arxiv.org/abs/2012.10402
Publikováno v:
Phys. Rev. Lett. 124, 057401 (2020)
Disorder is more the rule than the exception in natural and synthetic materials. Nonetheless, wave propagation within inhomogeneously disordered materials has received scant attention. We combine microwave experiments and theory to find the spatial v
Externí odkaz:
http://arxiv.org/abs/1912.11242
Autor:
Kang, Yuhao, Genack, Azriel Z.
Publikováno v:
Phys. Rev. A 103, 033507 (2021)
The discovery of topological insulators has opened new prospects for robust signal transport for electronic, phononic, and photonic devices. Though transport of topological protected edge states is robust to disorder, large fluctuations and lengthene
Externí odkaz:
http://arxiv.org/abs/1912.05151