5 papers
Anomalous conduction and second sound in the Fermi-Pasta-Ulam-Tsingou chain: wave-turbulence approach
Francesco De Vita, Giovanni Dematteis, Raffaele Mazzilli +3
One-dimensional particle chains are fundamental models to explain anomalous thermal conduction in low-dimensional solids like nanotubes and nanowires. In these systems the thermal…
Downscale energy fluxes in scale invariant oceanic internal wave turbulence
Giovanni Dematteis, Yuri V. Lvov
We analyze analytically and numerically the scale invariant stationary solution to the internal wave kinetic equation. Our analysis of the resonant energy transfers shows that the…
Coexistence of ballistic and Fourier regimes in the -FPUT lattice
Giovanni Dematteis, Lamberto Rondoni, Davide Proment +2
Commonly, thermal transport properties of one-dimensional systems are found to be anomalous. Here, we perform a numerical and theoretical study of the -FPUT chain, considered a…
Derivation of the Four-Wave Kinetic Equation in Action-Angle Variables
Miguel Onorato, Giovanni Dematteis
Starting from the action-angle variables and using a standard asymptotic expansion, here we present a new derivation of the Wave Kinetic Equation for resonant process of the type $…
Experimental Evidence of Hydrodynamic Instantons: The Universal Route to Rogue Waves
Giovanni Dematteis, Tobias Grafke, Miguel Onorato +1
A statistical theory of rogue waves is proposed and tested against experimental data collected in a long water tank where random waves with different degrees of nonlinearity are me…