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Controlling active self-assembly through broken particle symmetries
H. H. Wensink, V. Kantsler, R. E. Goldstein +1
Many structural properties of conventional passive materials are known to arise from the symmetries of their microscopic constituents. By contrast, it is largely unclear how the in…
Confinement Stabilizes a Bacterial Suspension into a Spiral Vortex
Hugo Wioland, Francis G. Woodhouse, Jörn Dunkel +2
Confining surfaces play crucial roles in dynamics, transport and order in many physical systems, but their effects on active matter, a broad class of dynamically self-organizing sy…
Inconsistent thermostatistics and negative absolute temperatures
Jörn Dunkel, Stefan Hilbert
A considerable body of experimental and theoretical work claims the existence of negative absolute temperatures in spin systems and ultra-cold quantum gases. Here, we clarify that…
Fluid dynamics of bacterial turbulence
Jörn Dunkel, Sebastian Heidenreich, Knut Drescher +3
Self-sustained turbulent structures have been observed in a wide range of living fluids, yet no quantitative theory exists to explain their properties. We report experiments on act…
Ciliary contact interactions dominate surface scattering of swimming eukaryotes
Vasily Kantsler, Jörn Dunkel, Marco Polin +1
Interactions between swimming cells and surfaces are essential to many microbiological processes, from bacterial biofilm formation to human fertilization. However, in spite of thei…