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dc.contributor.author Berhanu, M
dc.contributor.author Merminod, S
dc.contributor.author Castillo, G
dc.contributor.author Falcon, E
dc.date.accessioned 2024-01-17T15:56:16Z
dc.date.available 2024-01-17T15:56:16Z
dc.date.issued 2022
dc.identifier.uri https://repositorio.uoh.cl/handle/611/975
dc.description.abstract Driven granular media constitute model systems in out-of-equilibrium statistical physics. By assimilating the motions of granular particles to those of atoms, by analogy, one can obtain macroscopic equivalent of phase transitions. Here, we study fluid-like and crystal-like two-dimensional states in a driven granular material. In our experimental device, a tunable magnetic field induces and controls remote interactions between the granular particles. We use high-speed video recordings to analyse the velocity fluctuations of individual particles in stationary regime. Using statistical averaging, we find that the particles self-organize into collective excitations characterized by dispersion relations in the frequency-wavenumber space. These findings thus reveal that mechanical waves analogous to condensed matter phonons propagate in driven granular media. When the magnetic coupling is weak, the waves are longitudinal, as expected for a fluid-like phase. When the coupling is stronger, both longitudinal and transverse waves propagate, which is typically seen in solid-like phases. We model the dispersion relations using the spatial distribution of particles and their interaction potential. Finally, we infer the elastic parameters of the granular assembly from equivalent sound velocities, thus realizing the spectroscopy of a granular material.
dc.relation.uri http://dx.doi.org/10.1098/rspa.2022.0014
dc.subject driven granular media
dc.subject dispersion relations
dc.subject phonons
dc.subject elastic coefficients
dc.title Wave spectroscopy in a driven granular material
dc.type Artículo
uoh.revista PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
dc.identifier.doi 10.1098/rspa.2022.0014
dc.citation.volume 478
dc.citation.issue 2262
dc.identifier.orcid Berhanu, Michael/0000-0001-9099-2135
dc.identifier.orcid Falcon, Eric/0000-0001-9640-9895
dc.identifier.orcid Falcon, Eric/0000-0001-9640-9895
uoh.indizacion Web of Science


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