106 citations · 547 across the 30 of their papers we have counts for
30 papers
Activity drives self-assembly of passive soft inclusions in active nematics
Ahmet Umut Akduman, Yusuf Sariyar, Giuseppe Negro +1
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…
Hydrodynamic stability and pattern formation in hexatic epithelial layers
Josep-Maria Armengol-Collado, Leonardo Puggioni, Livio N. Carenza +1
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, la…
Thick liquid crystalline cholesteric shells
Arda Bulut, Yusuf Sariyar, Giuseppe Negro +1
We numerically investigate the phase behavior of thick shells of cholesteric liquid crystals with tangential anchoring at the shell boundary. For achiral liquid crystal, we demonst…
3D active nematic disclinations behave as Majorana quasiparticles
Louise C. Head, Giuseppe Negro, Livio N. Carenza +7
Quasiparticles are low-energy excitations with important roles in condensed matter physics. An intriguing example is provided by Majorana fermions, quasiparticles which are identic…
Controlling flow patterns and topology in active emulsions
Giuseppe Negro, Louise C. Head, Livio N. Carenza +4
Active emulsions and liquid crystalline shells are intriguing and experimentally realisable types of topological matter. Here we numerically study the morphology and spatiotemporal…
Quasi long-ranged order in two-dimensional active liquid crystals
Livio Nicola Carenza, Josep-Maria Armengol-Collado, Dimitrios Krommydas +1
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 par…
Phase behaviour and dynamics of three-dimensional active dumbbell systems
C. B. Caporusso, G. Negro, A. Suma +4
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 attrac…
Collective epithelial migration mediated by the unbinding of hexatic defects
Dimitrios Krommydas, Livio Nicola Carenza, Luca Giomi
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 foam…
Topological Phases and Curvature-Driven Pattern Formation in Cholesteric Shells
Giuseppe Negro, Livio Nicola Carenza, Giuseppe Gonnella +2
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 fo…
Motility and self propulsion of active droplets
L. N. Carenza, G. Gonnella, G. Negro
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 t…
Tuneable defect-curvature coupling and topological transitions in active shells
Ludwig A. Hoffmann, Livio Nicola Carenza, Luca Giomi
Recent experimental observations have suggested that topological defects can facilitate the creation of sharp features in developing embryos. Whereas these observations echo establ…
Yield-stress transition in suspensions of deformable droplets
Giuseppe Negro, Livio Nicola Carenza, Giuseppe Gonnella +3
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 stud…
Hydrodynamic Enhancement of -atic Defect Dynamics
Dimitrios Krommydas, Livio Nicola Carenza, Luca Giomi
We investigate numerically and analytically the effects of hydrodynamics on the dynamics of topological defects in atic liquid crystals, i.e. two-dimensional liquid crystals wi…
Epithelia are multiscale active liquid crystals
Josep-Maria Armengol-Collado, Livio Nicola Carenza, Julia Eckert +2
Biological processes such as embryogenesis, wound healing and cancer progression, crucially rely on the ability of epithelial cells to coordinate their mechanical activity over len…
Hydrodynamics and multiscale order in confluent epithelia
Josep-Maria Armengol-Collado, Livio Nicola Carenza, Luca Giomi
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 est…
Cholesteric shells: two-dimensional blue fog and finite quasicrystals
Livio Nicola Carenza, Giuseppe Gonnella, Davide Marenduzzo +2
We study the phase behaviour of a quasi-two dimensional cholesteric liquid crystal shell. We characterise the topological phases arising close to the isotropic-cholesteric transiti…
Theory of defect-mediated morphogenesis
Ludwig A. Hoffmann, Livio Nicola Carenza, Julia Eckert +1
Growing experimental evidence indicates that topological defects could serve as organizing centers in the morphogenesis of tissues. Here, we provide a quantitative explanation for…
Rheology of active emulsions with negative effective viscosity
Ilario Favuzzi, Livio Nicola Carenza, Federico Corberi +3
We numerically study by lattice Boltzmann simulations the rheological properties of an active emulsion made of a suspension of an active polar gel embedded in an isotropic passive…
Cascade or not cascade? Energy transfer and elastic effects in active nematics
Livio Nicola Carenza, Luca Biferale, Giuseppe Gonnella
We numerically study the multi-scale properties of a 2d active gel to address the energy transfer mechanism. We find that activity is able to excite long-ranged distortions of the…
Lattice Boltzmann simulations of self-propelling chiral active droplets
L. N. Carenza, G. Gonnella, G. Negro
Active matter describes materials whose constituents are driven out of equilibrium by continuous energy consumption, for instance from ATP. Due to the orientable character of the c…
Soft channel formation and symmetry breaking in exotic active emulsions
L. N. Carenza, G. Gonnella, A. Lamura +3
We use computer simulations to study the morphology and rheological properties of a bidimensional emulsion resulting from a mixture of a passive isotropic fluid and an active contr…
Activity induced isotropic-polar transition in active liquid crystals
M. G. Giordano, F. Bonelli, L. N. Carenza +2
Active fluids are intrinsically out-of-equilibrium systems due to the internal energy injection of the active constituents. We show here that a transition from a motion-less isotro…
Chaotic and periodical dynamics of active chiral droplets
Livio Nicola Carenza, Giuseppe Gonnella, Davide Marenduzzo +1
The interplay between the chirality of many biological molecules and the energy injected at small length-scales as the result of biological processes is at the base of the life of…
Rotation and propulsion in 3d active chiral droplets
Livio Nicola Carenza, Giuseppe Gonnella, Davide Marenduzzo +1
Chirality is a recurrent theme in the study of biological systems, in which active processes are driven by the internal conversion of chemical energy into work. Bacterial flagella,…