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8 papers · 2 filters
Two-Dimensional Matter: Order, Curvature and Defects
Mark J. Bowick, Luca Giomi
Many systems in nature and the synthetic world involve ordered arrangements of units on two-dimensional surfaces. We review here the fundamental role payed by both the topology of…
Elastic Theory of Defects in Toroidal Crystals
Luca Giomi, Mark J. Bowick
We report a comprehensive analysis of the ground state properties of axisymmetric toroidal crystals based on the elastic theory of defects on curved substrates. The ground state is…
Mechanical response of active gels
T. B. Liverpool, M. C. Marchetti, J. -F. Joanny +1
We study a model of an active gel of cross-linked semiflexible filaments with additional active linkers such as myosin II clusters. We show that the coupling of the elasticity of t…
Enhanced diffusion and ordering of self-propelled rods
Aparna Baskaran, M. Cristina Marchetti
Starting from a minimal physical model of self propelled hard rods on a substrate in two dimensions, we derive a modified Smoluchowski equation for the system. Self -propulsion enh…
Topology and Geometry of Smectic Order on Compact Curved Substrates
Xiangjun Xing
Smectic order on arbitrary curved substrate can be described by a differential form of rank one (1-form), whose geometric meaning is the differential of the local phase field of th…
Complex Spontaneous Flows and Concentration Banding in Active Polar Films
Luca Giomi, M. Cristina Marchetti, Tanniemola B. Liverpool
We study the dynamical properties of active polar liquid crystalline films. Like active nematic films, active polar films undergo a dynamical transitions to spontaneously flowing s…