We propose a two-population lattice Boltzmann model on standard lattices for the simulation of compressible flows. The is fully on-lattice and uses single relaxation time Bhatnagar–Gross–Krook kinetic equations along with appropriate correction terms to recover Navier–Stokes–Fourier equations. accuracy performance are analyzed through simulations benchmark cases including Sod shock tube, sound ...

We investigate theoretically how the stress propagation characteristics of granular materials evolve as they are subjected to increasing pressures, comparing the results of a two-dimensional scalar lattice model to those of a molecular dynamics simulation of slightly polydisperse disks. We characterize the statistical properties of the forces using the force histogram and a two-point spatial co...

Using Quasi-Monte Carlo integration, we found numerically that the spatial averages of chaotic quadratic maps either uctuate periodically or converge to constants. 1. Introduction A series of papers 3] 4] 5] 7] motivated us to study the dynamics of spatial averages of dynamical systems, especially, those with chaotic behaviors. The problem arises naturally when one considers the collective beha...

Ultrafast light pulses can modify electronic properties of quantum materials by perturbing the underlying, intertwined degrees of freedom. In particular, iron-based superconductors exhibit a strong coupling among electronic nematic fluctuations, spins and the lattice, serving as a playground for ultrafast manipulation. Here we use time-resolved X-ray scattering to measure the lattice dynamics o...

We use single-cycle THz fields and the femtosecond magneto-optical Kerr effect to, respectively, excite and probe the magnetization dynamics in two thin-film ferromagnets with different lattice structures: crystalline Fe and amorphous CoFeB. We observe Landau-Lifshitz-torque magnetization dynamics of comparable magnitude in both systems, but only the amorphous sample shows ultrafast demagnetiza...