1 citations · 1 across the 11 of their papers we have counts for
13 papers
Fully developed active turbulence defined through a non-equilibrium phase transition
Lasse Bonn, Tianxiang Ma, Olga Bantysh +7
Non-equilibrium systems challenge the standard definitions of phases and phase transitions from equilibrium statistical physics. For example, in active fluids continuous energy inj…
Spontaneous filament formation and network self-assembly via active phase separation
Elena Lucas, Varun Venkatesh, Amin Doostmohammadi
We introduce Active Model H, a scalar phase-field model of non-equilibrium phase separation in the overdamped hydrodynamic limit, and show that it produces filamentous networ…
Activity driven buckling and pattern formation in shells of oriented solids
Niels de Graaf Sousa, Varun Venkatesh, Amin Doostmohammadi
We investigate shells of active oriented solid, materials in which orientationally ordered active particles are embedded in a deformable elastic surface. Focusing on cylindrical ge…
Epithelia Realize Nematopolar Topological Defect Structures
Tianxiang Ma, Niels de Graaf Sousa, Valeriia Grudtsyna +2
We introduce a shape-based polar order parameter that captures the structural asymmetry of cells within epithelial monolayers. By combining bright-field imaging and traction force…
Cell-induced wrinkling patterns on soft substrates
Aleksandra Ardaševa, Varun Venkatesh, Daiki Matsunaga +2
Cells exert traction forces on compliant substrates and can induce surface instabilities that appear as characteristic wrinkling patterns. Here, we develop a mechanical description…
A spectrum of p-atic symmetries and defects in confluent epithelia
Lea Happel, Griseldis Oberschelp, Anneli Richter +4
Topological defects provide a unifying language to describe how orientational order breaks down in active and living matter. Considering cells as elongated particles confluent, epi…
Density-Velocity Relation Is Scale-Dependent in Epithelial Monolayers
Hengdong Lu, Tianxiang Ma, Amin Doostmohammadi
The relationship between cell density and velocity is often assumed to be negative, reflecting crowding-induced suppression of movement. However, observations across systems reveal…
Cellular Flow Architecture Exposes the Hidden Mechanics of Biological Matter
Tianxiang Ma, Valeriia Grudtsyna, Robin V. Bölsterli +1
Understanding how biomechanical reorganization governs key biological processes, such as morphogenesis and development, requires predictive insights into stress distributions and c…
Multi-phase-field Models of Biological Tissues
Siavash Monfared, Aleksandra Ardaševa, Amin Doostmohammadi
The development of complex multicellular organisms from a single parent cell is a highly orchestrated process that cells conduct collectively without central guidance, creating int…
Beyond Dipolar Activity: Quadrupolar Stress Drives Collapse of Nematic Order on Frictional Substrates
Aleksandra Ardaševa, Ignasi Vélez-Cerón, Martin Cramer Pedersen +3
The field of active nematics has traditionally employed descriptions based on dipolar activity, with interactions that align along a single axis. However, it has been theoretically…
Transport of topological defects in a biphasic mixture of active and passive nematic fluids
KVS Chaithanya, Aleksandra Ardaševa, Oliver J. Meacock +3
Collectively moving cellular systems often contain a proportion of dead cells or non-motile genotypes. When mixed, nematically aligning motile and non-motile agents are known to se…
Active particles knead three-dimensional gels into open crumbs
Martin Cramer Pedersen, Sourav Mukherjee, Amin Doostmohammadi +2
Colloidal gels are prime examples of functional materials exhibiting disordered, amorphous, yet meta-stable forms. They maintain stability through short-range attractive forces and…
Evidence of robust, universal conformal invariance in living biological matter
Benjamin H. Andersen, Francisco M. R. Safara, Valeriia Grudtsyna +5
Collective cellular movement plays a crucial role in many processes fundamental to health, including development, reproduction, infection, wound healing, and cancer. The emergent d…