3 papers
math.NA2024
Explicit Local Time-Stepping for the Inhomogeneous Wave Equation with Optimal Convergence
Marcus J. Grote, Simon R. J. Michel, Stefan A. Sauter
Adaptivity and local mesh refinement are crucial for the efficient numerical simulation of wave phenomena in complex geometry. Local mesh refinement, however, can impose a tiny tim…
cond-mat.mes-hall2020
Non-Hamiltonian dynamics of indirectly coupled classical impurity spins
Simon Michel, Michael Potthoff
We discuss the emergence of an effective low-energy theory for the real-time dynamics of two classical impurity spins within the framework of a prototypical and purely classical mo…
cond-mat.mes-hall2020
Topological spin torque emerging in classical-spin systems with different time scales
Michael Elbracht, Simon Michel, Michael Potthoff
In classical spin systems with two largely different inherent time scales, the configuration of the fast spins almost instantaneously follows the slow-spin dynamics. We develop the…