65 citations · 703 across the 31 of their papers we have counts for
6 papers · 1 filter
Collective mechano-response dynamically tunes cell-size distributions in growing bacterial colonies
René Wittmann, G. H. Philipp Nguyen, Hartmut Löwen +2
Mechanical stresses stemming from environmental factors are a key determinant of cellular behavior and physiology. Yet, the role of self-induced biomechanical stresses in growing b…
Density functional approach to elastic properties of three-dimensional dipole-spring models for magnetic gels
Segun Goh, Andreas M. Menzel, René Wittmann +1
Magnetic gels are composite materials, consisting of a polymer matrix and embedded magnetic particles. Those are mechanically coupled to each other, giving rise to the magnetostric…
Geometric criteria for the absence of effective many-body interactions in nonadditive hard particle mixtures
René Wittmann, Sabine Jansen, Hartmut Löwen
We consider a mixture of small and big classical particles in arbitrary spatial dimensions interacting via hard-body potentials with non-additive excluded-volume interactions. In p…
Active particles driven by competing spatially dependent self-propulsion and external force
Lorenzo Caprini, Umberto Marini Bettolo Marconi, René Wittmann +1
We investigate how the competing presence of a nonuniform motility landscape and an external confining field affects the properties of active particles. We employ the active Ornste…
Topological fine structure of smectic grain boundaries and tetratic disclination lines within three-dimensional smectic liquid crystals
Paul A. Monderkamp, René Wittmann, Michael te Vrugt +3
Observing and characterizing the complex ordering phenomena of liquid crystals subjected to external constraints constitutes an ongoing challenge for chemists and physicists alike.…
The Parental Active Model: a unifying stochastic description of self-propulsion
Lorenzo Caprini, Alexander Ralf Sprenger, Hartmut Löwen +1
We propose a new overarching model for self-propelled particles that flexibly generates a full family of "descendants". The general dynamics introduced in this paper, which we deno…