Topological chaos in active nematics
Sign Up to like & getrecommendations! Published in 2019 at "Nature Physics"
DOI: 10.1038/s41567-019-0600-y
Abstract: Active nematics are out-of-equilibrium fluids composed of rod-like subunits, which can generate large-scale, self-driven flows. We examine a microtubule-kinesin-based active nematic confined to two dimensions, exhibiting chaotic flows with moving topological defects. Applying tools from… read more here.
Keywords: chaos active; topological chaos; topological entropy; active nematics ... See more keywords
Statistical properties of autonomous flows in 2D active nematics.
Sign Up to like & getrecommendations! Published in 2019 at "Soft matter"
DOI: 10.1039/c8sm01877d
Abstract: We study the dynamics of a tunable 2D active nematic liquid crystal composed of microtubules and kinesin motors confined to an oil-water interface. Kinesin motors continuously inject mechanical energy into the system through ATP hydrolysis,… read more here.
Keywords: active nematics; kinesin motors; autonomous flows; properties autonomous ... See more keywords
Understanding topological defects in fluidized dry active nematics.
Sign Up to like & getrecommendations! Published in 2022 at "Soft matter"
DOI: 10.1039/d1sm01405f
Abstract: Dense assemblies of self-propelling rods (SPRs) may exhibit fascinating collective behaviors and anomalous physical properties that are far away from equilibrium. Using large-scale Brownian dynamics simulations, we investigate the dynamics of disclination defects in 2D… read more here.
Keywords: defects fluidized; understanding topological; fluidized dry; dry active ... See more keywords
Quadrupolar active stress induces exotic patterns of defect motion in compressible active nematics.
Sign Up to like & getrecommendations! Published in 2022 at "Soft matter"
DOI: 10.1039/d1sm01683k
Abstract: A wide range of living and artificial active matter exists in close contact with substrates and under strong confinement, where in addition to dipolar active stresses, quadrupolar active stresses can become important. Here, we numerically… read more here.
Keywords: topological defect; quadrupolar active; defect motion; self organisation ... See more keywords
Activity gradients in two- and three-dimensional active nematics.
Sign Up to like & getrecommendations! Published in 2022 at "Soft matter"
DOI: 10.1039/d2sm00228k
Abstract: We numerically investigate how spatial variations of extensile or contractile active stress affect bulk active nematic systems in two and three dimensions. In the absence of defects, activity gradients drive flows which re-orient the nematic… read more here.
Keywords: dimensional active; two three; three dimensional; activity ... See more keywords
Majorana quasiparticles and topological phases in 3D active nematics
Sign Up to like & getrecommendations! Published in 2024 at "Proceedings of the National Academy of Sciences of the United States of America"
DOI: 10.1073/pnas.2405304121
Abstract: Significance Majorana fermions are particles which are equivalent to their antiparticles. They were proposed long ago, but no elementary particle with their properties has yet been found. Instead, quantum condensed matter has provided examples of… read more here.
Keywords: majorana quasiparticles; quasiparticles topological; topological phases; active nematics ... See more keywords
Nematic order condensation and topological defects in inertial active nematics.
Sign Up to like & getrecommendations! Published in 2022 at "Physical review. E"
DOI: 10.1103/physreve.106.014705
Abstract: Living materials at different length scales manifest active nematic features such as orientational order, nematic topological defects, and active nematic turbulence. Using numerical simulations we investigate the impact of fluid inertia on the collective pattern… read more here.
Keywords: order condensation; order; topological defects; active nematics ... See more keywords
Self-Driven Droplet Powered By Active Nematics.
Sign Up to like & getrecommendations! Published in 2017 at "Physical review letters"
DOI: 10.1103/physrevlett.119.108002
Abstract: Active matter defines a class of far-away-from-equilibrium systems comprising self-driven microparticles. Their anomalous physical properties could be applied in areas such as mixing or separation, micropumps, and self-healing materials. To realize such applications, a thorough… read more here.
Keywords: driven droplet; droplet powered; powered active; active nematics ... See more keywords
Understanding Dense Active Nematics from Microscopic Models.
Sign Up to like & getrecommendations! Published in 2019 at "Physical review letters"
DOI: 10.1103/physrevlett.123.258001
Abstract: We study dry, dense active nematics at both particle and continuous levels. Specifically, extending the Boltzmann-Ginzburg-Landau approach, we derive well-behaved hydrodynamic equations from a Vicsek-style model with nematic alignment and pairwise repulsion. An extensive study… read more here.
Keywords: active nematics; understanding dense; microscopic models; nematics microscopic ... See more keywords
Data-Driven Discovery of Active Nematic Hydrodynamics.
Sign Up to like & getrecommendations! Published in 2022 at "Physical review letters"
DOI: 10.1103/physrevlett.129.258001
Abstract: Active nematics can be modeled using phenomenological continuum theories that account for the dynamics of the nematic director and fluid velocity through partial differential equations (PDEs). While these models provide a statistical description of the… read more here.
Keywords: hydrodynamics; discovery active; data driven; active nematic ... See more keywords
Environment-Stored Memory in Active Nematics and Extra-Cellular Matrix Remodeling.
Sign Up to like & getrecommendations! Published in 2024 at "Physical review letters"
DOI: 10.1103/physrevlett.133.118402
Abstract: Many active systems display nematic order, while interacting with their environment. In this Letter, we show theoretically how environment-stored memory acts an effective external field that aligns active nematics. The coupling to the environment leads… read more here.
Keywords: environment; environment stored; cellular matrix; extra cellular ... See more keywords