SISSA Open Science

Defect annihilation and proliferation in active nematics

Show simple item record Giomi, Luca Bowick, Mark J. Ma, Xu Marchetti, Maria Cristina 2013-04-04T10:04:04Z 2013-04-04T10:04:04Z 2013-03-19
dc.description 5 pages, 4 figures en_US
dc.description.abstract Liquid crystals inevitably possess topological defect excitations generated through boundary conditions, applied fields or in quenches to the ordered phase. In equilibrium pairs of defects coarsen and annihilate as the uniform ground state is approached. Here we show that defects in active liquid crystals exhibit profoundly different behavior, depending on the degree of activity and its contractile or extensile character. While contractile systems enhance the annihilation dynamics of passive systems, extensile systems act to drive defects apart so that they swarm around in the manner of topologically well-characterized self-propelled particles. We develop a simple analytical model for the defect dynamics which reproduces the key features of both the numerical solutions and recent experiments on microtuble-kinesin assemblies. en_US
dc.language.iso en en_US
dc.publisher SISSA en_US
dc.relation.ispartofseries arXiv:1303.4720;
dc.rights SISSA en_US
dc.title Defect annihilation and proliferation in active nematics en_US
dc.type Preprint en_US
dc.miur.area 2 en_US
dc.contributor.area Mathematics en_US

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