Livio Nicola Carenza
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View article: Collective epithelial migration mediated by the unbinding of hexatic defects
Collective epithelial migration mediated by the unbinding of hexatic defects Open
Collective cell migration in epithelia relies on cell intercalation: a local remodelling of the cellular network that allows neighbouring cells to swap their positions. Unlike foams and passive cellular fluid, in epithelial intercalation t…
View article: Collective epithelial migration mediated by the unbinding of hexatic defects
Collective epithelial migration mediated by the unbinding of hexatic defects Open
Collective cell migration in epithelia relies on cell intercalation: a local remodelling of the cellular network that allows neighbouring cells to swap their positions. Unlike foams and passive cellular fluid, in epithelial intercalation t…
View article: Activity drives self-assembly of passive soft inclusions in active nematics
Activity drives self-assembly of passive soft inclusions in active nematics Open
Active nematics are out-of-equilibrium systems in which energy injection at the microscale drives emergent collective behaviors, from spontaneous flows to active turbulence. While the dynamics of these systems have been extensively studied…
View article: Shear-induced structural transitions in confined nematic soft interfaces
Shear-induced structural transitions in confined nematic soft interfaces Open
Research on aqueous-interfaced liquid crystals (LCs) offered valuable outcomes leading to successful applications in sensing and actuation systems. The forward leap of the promising findings in stagnant LC systems will be achieved by the i…
View article: Hydrodynamic stability and pattern formation in hexatic epithelial layers
Hydrodynamic stability and pattern formation in hexatic epithelial layers Open
We investigate the hydrodynamic stability and the formation of patterns in a continuum model of epithelial layers, able to account for the interplay between mechanical activity, lateral adhesion and the $6-$fold orientational order origina…
View article: Topology controls flow patterns in active double emulsions
Topology controls flow patterns in active double emulsions Open
Active emulsions and liquid crystalline shells are intriguing and experimentally realisable types of topological matter. Here we numerically study the morphology and spatiotemporal dynamics of a double emulsion, where one or two passive sm…
View article: Dataset for Thick Liquid Crystalline Cholesteric Shells
Dataset for Thick Liquid Crystalline Cholesteric Shells Open
The dataset is organized in directories containing the data used to produce Fig. 1-5 in the article "Thick liquid crystalline cholesteric shells" (ArXiv identifier: arXiv:2501.00516) Each director contains subdirectories for each panel in …
View article: Majorana quasiparticles and topological phases in 3D active nematics
Majorana quasiparticles and topological phases in 3D active nematics Open
Quasiparticles are low-energy excitations with important roles in condensed matter physics. An intriguing example is provided by Majorana quasiparticles, which are equivalent to their antiparticles. Despite being implicated in neutrino osc…
View article: Defect-populated configurations in nematic solid tori and cylinders
Defect-populated configurations in nematic solid tori and cylinders Open
We make toroidal droplets of nematic liquid crystal and explore the defect-populated stable configurations that appear after heating to the isotropic phase and cooling back to the nematic phase. These configurations, as confirmed by simula…
View article: 3D active nematic disclinations behave as Majorana quasiparticles
3D active nematic disclinations behave as Majorana quasiparticles Open
Quasiparticles are low-energy excitations with important roles in condensed matter physics. An intriguing example is provided by Majorana fermions, quasiparticles which are identical to their antiparticles. Despite being implicated in neut…
View article: Controlling flow patterns and topology in active emulsions
Controlling flow patterns and topology in active emulsions Open
Active emulsions and liquid crystalline shells are intriguing and experimentally realisable types of topological matter. Here we numerically study the morphology and spatiotemporal dynamics of a double emulsion, where one or two passive sm…
View article: Controlling flow patterns and topology in active emulsions
Controlling flow patterns and topology in active emulsions Open
Active emulsions and liquid crystalline shells are intriguing and experimentally realisable types of topological matter. Here we numerically study the morphology and spatiotemporal dynamics of a double emulsion, where one or two passive sm…
View article: Hydrodynamics and multiscale order in confluent epithelia
Hydrodynamics and multiscale order in confluent epithelia Open
We formulate a hydrodynamic theory of confluent epithelia: i.e. monolayers of epithelial cells adhering to each other without gaps. Taking advantage of recent progresses toward establishing a general hydrodynamic theory of p -atic liquid c…
View article: Phase behaviour and dynamics of three-dimensional active dumbbell systems
Phase behaviour and dynamics of three-dimensional active dumbbell systems Open
We present the phase behavior and dynamics of a three-dimensional active dumbbell system with attractive interactions. We identify several distinct phases, including a disordered, a gel, an active percolating network phase, and a phase sep…
View article: Quasi long-ranged order in two-dimensional active liquid crystals
Quasi long-ranged order in two-dimensional active liquid crystals Open
Quasi-long ranged order is the hallmark of two-dimensional liquid crystals. At equilibrium, this property implies that the correlation function of the local orientational order parameter decays with distance as a power law: i.e. $\sim|\bol…
View article: Phase behaviour and dynamics of three-dimensional active dumbbell systems
Phase behaviour and dynamics of three-dimensional active dumbbell systems Open
We present a comprehensive numerical study of the phase behavior and dynamics of a three-dimensional active dumbbell system with attractive interactions. We demonstrate that attraction is essential for the system to exhibit nontrivial phas…
View article: Collective epithelial migration mediated by the unbinding of hexatic defects
Collective epithelial migration mediated by the unbinding of hexatic defects Open
Collective cell migration in epithelia relies on cell intercalation: a local remodelling of the cellular network that allows neighbouring cells to swap their positions. Unlike foams and passive cellular fluid, in epithelial intercalation t…
View article: Epithelia are multiscale active liquid crystals
Epithelia are multiscale active liquid crystals Open
Row and processed dataset presented in Armengol-Collado et al. Epithelia are multiscale active liquid crystals. Nature Physics (2023).\n\n\nA description of the content of this folder is provided in the readme file.
View article: Epithelia are multiscale active liquid crystals
Epithelia are multiscale active liquid crystals Open
Row and processed dataset presented in Armengol-Collado et al. Epithelia are multiscale active liquid crystals. Nature Physics (2023). A description of the content of this folder is provided in the readme file.
View article: Yield-stress transition in suspensions of deformable droplets
Yield-stress transition in suspensions of deformable droplets Open
Yield-stress materials, which require a sufficiently large forcing to flow, are currently ill-understood theoretically. To gain insight into their yielding transition, we study numerically the rheology of a suspension of deformable droplet…
View article: Motility and Self-propulsion of Active Droplets
Motility and Self-propulsion of Active Droplets Open
In the last few years, self-motile droplets have attracted the attention of scientists from different fields ranging from applied biology to theoretical physics, because of their promising technological applications and important biologica…
View article: Topological phases and curvature-driven pattern formation in cholesteric shells
Topological phases and curvature-driven pattern formation in cholesteric shells Open
We study the phase behaviour of thin shells of cholesteric liquid crystal with spherical, ellipsoidal and toroidal shape, where the interplay between geometry, topology and chirality contributes to the development of blue phases.
View article: Topological Phases and Curvature-Driven Pattern Formation in Cholesteric Shells
Topological Phases and Curvature-Driven Pattern Formation in Cholesteric Shells Open
We study the phase behaviour of cholesteric liquid crystal shells with different geometries. We compare the cases of tangential and no anchoring at the surface, focussing on the former case, which leads to a competition between the intrins…
View article: Motility and self propulsion of active droplets
Motility and self propulsion of active droplets Open
In the last years self-motile droplets attracted the attention of scientists from different fields ranging from applied biology to theoretical physics, because of their promising technological applications and important biological implicat…
View article: Tuneable defect-curvature coupling and topological transitions in active shells
Tuneable defect-curvature coupling and topological transitions in active shells Open
Recent experimental observations have suggested that topological defects can facilitate the creation of sharp features in developing embryos. Whereas these observations echo established knowledge about the interplay between geometry and to…
View article: Theory of defect-mediated morphogenesis
Theory of defect-mediated morphogenesis Open
Growing experimental evidence indicates that topological defects could serve as organizing centers in the morphogenesis of tissues. Here, we provide a quantitative explanation for this phenomenon, rooted in the buckling theory of deformabl…
View article: Hydrodynamic Enhancement of $p$-atic Defect Dynamics
Hydrodynamic Enhancement of $p$-atic Defect Dynamics Open
We investigate numerically and analytically the effects of hydrodynamics on the dynamics of topological defects in $p-$atic liquid crystals, i.e. two-dimensional liquid crystals with $p-$fold rotational symmetry. Importantly, we find that …
View article: Yield-stress transition in suspensions of deformable droplets
Yield-stress transition in suspensions of deformable droplets Open
Yield-stress materials, which require a sufficiently large forcing to flow, are currently ill-understood theoretically. To gain insight into their yielding transition, here we study numerically the rheology of a suspension of deformable dr…
View article: Dataset: Theory of defect-mediated morphogenesis
Dataset: Theory of defect-mediated morphogenesis Open
This archive contains the experimental and numerical data produced and analyzed for the article "Theory of defect-mediated morphogenesis". The archive is divded in two main folders: - Experimental_Data - Simulation_Data The folder "Experi…