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Active smectics on a sphere
Michael Nestler, Simon Praetorius, Zhi-Feng Huang +2
The dynamics of active smectic liquid crystals confined on a spherical surface is explored through an active phase field crystal model. Starting from an initially randomly perturbe…
Emergent memory from tapping collisions in active granular matter
Lorenzo Caprini, Anton Ldov, Rahul Kumar Gupta +4
In an equilibrium thermal environment, random elastic collisions between background particles and a tracer establish the picture of Brownian motion fulfilling the celebrated Einste…
Patchy landscapes promote stability of small groups
Gianni Jacucci, Davide Breoni, Sandrine Heijnen +5
Group formation and coordination are fundamental characteristics of living systems, essential for performing tasks and ensuring survival. Interactions between individuals play a ke…
Universal Hyperuniformity in Active Field Theories
Yuanjian Zheng, Michael A. Klatt, Hartmut Löwen
We show that dry scalar-order active field theories (AFTs) are universally hyperuniform, i.e., density fluctuations are anomalously suppressed in the long-time limit regardless of…
Inertial self-propelled particles in anisotropic environments
Alexander R. Sprenger, Christian Scholz, Anton Ldov +2
Self-propelled particles in anisotropic environments can exhibit a motility that depends on their orientation. This dependence is relevant for a plethora of living organisms but di…
Entropy production and collective excitations of crystals out of equilibrium: the concept of entropons
Lorenzo Caprini, Umberto Marini Bettolo Marconi, Hartmut Löwen
We study the collective vibrational excitations of crystals under out-of-equilibrium steady conditions that give rise to entropy production. Their excitation spectrum comprises equ…