Three-dimensional spontaneous flow transition in a homeotropic active nematic DOI Creative Commons
Vincenzo J. Pratley, Enej Caf, Miha Ravnik

et al.

Communications Physics, Journal Year: 2024, Volume and Issue: 7(1)

Published: April 13, 2024

Abstract Active nematics are driven, non-equilibrium systems relevant to biological processes including tissue mechanics and morphogenesis, active metamaterials in general. We study the three-dimensional spontaneous flow transition of an nematic infinite slab geometry using a combination numerics analytics. show that it is determined by interplay two eigenmodes – called S- D-mode unstable at same activity threshold spontaneously breaks both rotational symmetry chiral symmetry. The onset modes described non-Hermitian integro-differential operator, which we determine their exponential growth rates from perturbation theory. S-mode fastest growing. After reaches finite amplitude, anisotropic, being promoted perpendicular suppressed parallel it, forming steady state with full director field well-defined chirality. Lastly, derive model leading-order time evolution system close threshold.

Language: Английский

Topological active matter DOI
Suraj Shankar, Anton Souslov, Mark J. Bowick

et al.

Nature Reviews Physics, Journal Year: 2022, Volume and Issue: 4(6), P. 380 - 398

Published: May 6, 2022

Language: Английский

Citations

253
Spontaneous self-constraint in active nematic flows DOI Creative Commons
Louise C. Head,

C. Doré,

Ryan R. Keogh

et al.

Nature Physics, Journal Year: 2024, Volume and Issue: 20(3), P. 492 - 500

Published: Jan. 18, 2024

Abstract Active processes drive biological dynamics across various scales and include subcellular cytoskeletal remodelling, tissue development in embryogenesis the population-level expansion of bacterial colonies. In each these, functionality requires collective flows to occur while self-organised structures are protected. However, mechanisms by which active can spontaneously constrain their preserve structure not known. Here, studying defect nematic films, we demonstrate existence a self-constraint, namely two-way, arising relationship between activity-driven isosurfaces flow boundaries mesoscale structures. We show that self-motile defects tightly constrained viscometric surfaces, contours along vorticity strain rate balanced. This turn reveals break mirror symmetry when they move single surface. is explained an interdependence surfaces bend walls, elongated narrow kinks orientation field. These findings indicate cannot be treated as solitary points. Instead, associated deformations key steady-state coupling hydrodynamic flows. cross-field self-constraint offers framework for tackling complex three-dimensional turbulence, designing dynamic control into biomimetic materials understanding how systems employ stress self-organisation.

Language: Английский

Citations

16
Pattern formation by turbulent cascades DOI Creative Commons
Xander M. de Wit,

Michel Fruchart,

Tali Khain

et al.

Nature, Journal Year: 2024, Volume and Issue: 627(8004), P. 515 - 521

Published: March 20, 2024

Abstract Fully developed turbulence is a universal and scale-invariant chaotic state characterized by an energy cascade from large to small scales at which the eventually arrested dissipation 1–6 . Here we show how harness these seemingly structureless turbulent cascades generate patterns. Pattern formation entails process of wavelength selection, can usually be traced linear instability homogeneous 7 By contrast, mechanism propose here fully nonlinear. It triggered non-dissipative arrest cascades: piles up intermediate scale, neither system size nor smallest dissipated. Using combination theory large-scale simulations, that tunable cascade-induced patterns set transport coefficient called odd viscosity, ubiquitous in chiral fluids ranging bioactive quantum systems 8–12 Odd acts as scale-dependent Coriolis-like force, leads two-dimensionalization flow scales, contrast with rotating occurs 4 Apart viscosity fluids, discuss arise natural systems, including atmospheric flows 13–19 , stellar plasma such solar wind 20–22 or pulverization coagulation objects droplets mass rather than 23–25

Language: Английский

Citations

16
Metareview: a survey of active matter reviews DOI Creative Commons
Michael te Vrugt, Raphael Wittkowski

The European Physical Journal E, Journal Year: 2025, Volume and Issue: 48(2)

Published: Feb. 1, 2025

In the past years, amount of research on active matter has grown extremely rapidly, a fact that is reflected in particular by existence more than 1000 reviews this topic. Moreover, field become very diverse, ranging from theoretical studies statistical mechanics particles to applied work medical applications microrobots and biological systems artificial swimmers. This makes it difficult get an overview over as whole. Here, we provide such form metareview article surveys existing review articles books matter. Thereby, provides useful starting point for finding literature about specific

Language: Английский

Citations

2
Disordered Collective Motion in Dense Assemblies of Persistent Particles DOI
Yann-Edwin Keta, Robert L. Jack, Ludovic Berthier

et al.

Physical Review Letters, Journal Year: 2022, Volume and Issue: 129(4)

Published: July 19, 2022

We explore the emergence of nonequilibrium collective motion in disordered nonthermal active matter when persistent and crowding effects compete, using simulations a two-dimensional model size polydisperse self-propelled particles. In stark contrast with monodisperse systems, we find that polydispersity stabilizes homogeneous liquid at arbitrary large persistence times, characterized by remarkable velocity correlations irregular turbulent flows. For all values, fluid undergoes glass transition density. This is accompanied motion, whose nature evolves from near-equilibrium spatially heterogeneous dynamics small persistence, to qualitatively different intermittent large. latter regime involves complex time evolution correlated displacement field.

Language: Английский

Citations

50
Interacting spiral wave patterns underlie complex brain dynamics and are related to cognitive processing DOI
Yiben Xu, Xian Long, Jianfeng Feng

et al.

Nature Human Behaviour, Journal Year: 2023, Volume and Issue: 7(7), P. 1196 - 1215

Published: June 15, 2023

Language: Английский

Citations

39
Design rules for controlling active topological defects DOI Creative Commons
Suraj Shankar,

Luca V. D. Scharrer,

Mark J. Bowick

et al.

Proceedings of the National Academy of Sciences, Journal Year: 2024, Volume and Issue: 121(21)

Published: May 15, 2024

Topological defects play a central role in the physics of many materials, including magnets, superconductors, and liquid crystals. In active fluids, become autonomous particles that spontaneously propel from internal stresses drive chaotic flows stirring fluid. The intimate connection between defect textures flow suggests properties materials can be engineered by controlling defects, but design principles for their spatiotemporal control remain elusive. Here, we propose symmetry-based additive strategy using elementary activity patterns, as topological tweezers, to create, move, braid such defects. By combining theory simulations, demonstrate how, at collective level, spatial gradients act like electric fields which, when strong enough, induce an inverted polarization akin negative susceptibility dielectric. We harness this feature dynamic setting collectively pattern transport interacting Our work establishes framework sculpt manipulate both space time, paving way programmable living transport, memory, logic.

Language: Английский

Citations

13
Active Matter under Control: Insights from Response Theory DOI Creative Commons
Luke K. Davis, Karel Proesmans, Étienne Fodor

et al.

Physical Review X, Journal Year: 2024, Volume and Issue: 14(1)

Published: Feb. 7, 2024

Active constituents burn fuel to sustain individual motion, giving rise collective effects that are not seen in systems at thermal equilibrium, such as phase separation with purely repulsive interactions. There is a great potential harnessing the striking phenomenology of active matter build novel controllable and responsive materials surpass passive ones. Yet, we currently lack systematic roadmap predict protocols driving between different states way thermodynamically optimal. Equilibrium thermodynamics an inadequate foundation this end, due dissipation rate arising from constant consumption matter. Here, derive implement versatile framework for thermodynamic control Combining recent developments stochastic response theory, our approach shows how find optimal either continuous- or discrete-state operating out equilibrium. Our results open door designing only built stabilize specific nonequilibrium but also optimized switch minimum dissipation. Published by American Physical Society 2024

Language: Английский

Citations

12
Emerging Mesoscale Flows and Chaotic Advection in Dense Active Matter DOI Creative Commons
Yann-Edwin Keta, Juliane U. Klamser, Robert L. Jack

et al.

Physical Review Letters, Journal Year: 2024, Volume and Issue: 132(21)

Published: May 22, 2024

We study two models of overdamped self-propelled disks in dimensions, with and without aligning interactions. Both support active mesoscale flows, leading to chaotic advection transport over large length scales their homogeneous dense fluid states, away from dynamical arrest. They form streams vortices reminiscent multiscale flow patterns turbulence. show that the characteristics these flows do not depend on specific details fluids, result competition between crowding effects persistent propulsions. This observation suggests suspensions particles present a type "active turbulence" distinct collective reported other types systems.

Language: Английский

Citations

10
E-cadherin biomaterials reprogram collective cell migration and cell cycling by forcing homeostatic conditions DOI Creative Commons
Kevin Suh, Youn Kyoung Cho, Isaac B. Breinyn

et al.

Cell Reports, Journal Year: 2024, Volume and Issue: 43(2), P. 113743 - 113743

Published: Feb. 1, 2024

Cells attach to the world through either cell-extracellular matrix adhesion or cell-cell adhesion, and traditional biomaterials imitate for integrin-based adhesion. However, materials incorporating cadherin proteins that mimic offer an alternative program cell behavior integrate into living tissues. We investigated how substrates affect collective migration cycling in epithelia. Our approach involved with on one-half E-cadherin other, forming a "Janus" interface across which we grew single sheet of cells. Tissue regions over side exhibited normal dynamics, but abrupt shift occurred Janus boundary onto side, where cells attached substrate via adhesions, resulting stalled slowing cycle. surfaces disrupted long-range mechanical coordination nearly doubled length G0/G1 phase cycle, linked lack integrin focal adhesions surface.

Language: Английский

Citations

9