4 papers
Three-term recurrence iterations for energy-based models
R. Altmann, J. Ramme, P. Schulze
It is well-known that the midpoint rule preserves the dissipation inequality if applied to a certain class of energy-based models. We introduce an appropriate scaling of the state…
Energy-based modeling for field-circuit coupling
Robert Altmann, Idoia Cortes Garcia, Elias Paakkunainen +2
This paper presents a generalized energy-based modeling framework extending recent formulations tailored for differential-algebraic equations. The proposed structure, inspired by t…
Gautschi-type and implicit-explicit integrators for constrained wave equations
R. Altmann, B. Dörich, C. Zimmer
This paper deals with the construction and analysis of two integrators for (semi-linear) second-order partial differential-algebraic equations of semi-explicit type. More precisely…
Riemannian optimisation methods for ground states of multicomponent Bose-Einstein condensates
R. Altmann, M. Hermann, D. Peterseim +1
This paper addresses the computation of ground states of multicomponent Bose-Einstein condensates, defined as the global minimiser of an energy functional on an infinite-dimensiona…