20.500.12556/RUL-155522 Defect line coarsening and refinement in active nematics Active matter is naturally out of equilibrium which results in the emergence of diverse dynamic steady states, including the omnipresent chaotic state known as the active turbulence. However, much less is known how active systems dynamically depart out of these configurations, such as get excited or damped to a different dynamic steady state. In this Letter, we demonstrate the coarsening and refinement dynamics of topological defect lines in three-dimensional active nematic turbulence. Specifically, using theory and numerical modeling, we are able to predict the evolution of the active defect density away from the steady state due to time-dependent activity or viscoelastic material properties, establishing a single length scale phenomenological description of defect line coarsening and refinement in a three-dimensional active nematic. The approach is first applied to growth dynamics of a single active defect loop, and then to a full threedimensional active defect network. More generally, this Letter provides insight into the general coarsening phenomena between dynamical regimes in 3Dactivematter, with a possible analogy in other physical systems. soft matter physics active nematics fizika mehke snovi aktivni nematiki true false true Angleški jezik Slovenski jezik Članek v reviji 2024-04-05 09:13:26 2024-04-05 09:13:26 2024-04-06 04:17:37 0000-00-00 00:00:00 2023 0 0 Str. 128101-1-128101-6 iss. 12 Vol. 130 2023 0000-00-00 Zaloznikova NiDoloceno apc 0000-00-00 0000-00-00 2023-03-21 538.9 0031-9007 10.1103/PhysRevLett.130.128101 147577091 Clanek_Kralj.pdf Clanek_Kralj.pdf 1 CEC4BA0FC8B4E99BEBDF3372BDDCD51D 45310aa2c5d21edb99639b637276f557c2ac1b6f647cd6a1d48aa8cdddbb7507 3a3e5f56-f31c-11ee-afc9-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=182455 https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.130.128101 0 48760312-f31c-11ee-afc9-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=182456 Fakulteta za matematiko in fiziko 0 0 0