Odd dynamics of living chiral crystals.

  title={Odd dynamics of living chiral crystals.},
  author={Tzer Han Tan and Alexander Mietke and Junang Li and Yuchao Chen and Hugh Higinbotham and Peter J. Foster and Shreyas Gokhale and J{\"o}rn Dunkel and Nikta Fakhri},
  volume={607 7918},
Active crystals are highly ordered structures that emerge from the self-organization of motile objects, and have been widely studied in synthetic1,2 and bacterial3,4 active matter. Whether persistent  crystalline order can emerge  in groups of autonomously developing multicellular organisms is currently unknown. Here we show that swimming starfish embryos spontaneously assemble into chiral crystals that span thousands of spinning organisms and persist for tens of hours. Combining experiments… 

Signatures of odd dynamics in viscoelastic systems: from spatiotemporal pattern formation to odd rheology

Non-reciprocal interactions fueled by local energy consumption are found in biological and syn-thetic active matter, where both viscosity and elasticity are often important. Such systems can be

The extreme mechanics of viscoelastic metamaterials

Mechanical metamaterials made of flexible building blocks can exhibit a plethora of extreme mechanical responses, such as negative elastic constants, shape-changes, programmability, and memory. To

The Nematic Chiral Liquid Crystal Structure of the Cardiac Myoarchitecture: Disclinations and Topological Singularities.

The description of the disclinations must be considered in any attempt to segment the whole ventricular mass, in biomechanical studies, and, more generally, for the characterization of myocardial remodeling.

Odd elasticity and topological waves in active surfaces

Odd elasticity encompasses active elastic systems whose stress-strain relationship is not compatible with a potential energy. As the requirement of energy conservation is lifted from linear

Odd Cosserat elasticity in active materials

Stress-strain constitutive relations in solids with an internal angular degree of freedom can be modelled using Cosserat (also called micropolar) elasticity. In this paper, we explore the

Odd moduli of disordered odd elastic lattices

We study the effects of bond disorder on triangular and honeycomb lattices where each spring has a probability p to be odd elastic. Using an effective medium theory and numerical simulations, we

Sync and Swarm: Solvable Model of Nonidentical Swarmalators

We study a model of non-identical swarmalators, generalizations of phase oscillators that both sync in time and swarm in space. The model produces four collective states: asynchrony, sync clusters,

Active solids sync up

An active solid composed of confined robots is reported. Through elastic interactions, the robots sync up to create novel states of coherent motion.

Small fire ant rafts are unstable

Living chiral crystals



Hydrodynamic self-assembly of active colloids: chiral spinners and dynamic crystals.

It is shown that the chirality of the individual spinners controls the topology of the self-assembly in solution: homochiral samples assemble into a hexagonally symmetric 2D crystal lattice while racemic mixtures show reduced hexatic order with diffusion-like dynamics.

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Thiovulum majus self-organize on glass surfaces into active two-dimensional crystals of rotating cells. Unlike classical crystals, these bacterial crystallites continuously rotate and reorganize as

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