292 citations · 929 across the 12 of their papers we have counts for
13 papers
Resonant diffusion of a gravitactic circle swimmer
Oleksandr Chepizhko, Thomas Franosch
We investigate the dynamics of a single chiral active particle subject to an external torque due to the presence of a gravitational field. Our computer simulations reveal an arbitr…
Random motion of a circle microswimmer in a random environment
Oleksandr Chepizhko, Thomas Franosch
We simulate the dynamics of a single circle microswimmer exploring a disordered array of fixed obstacles. The interplay of two different types of randomness, quenched disorder and…
Chromatin and cytoskeletal tethering determine nuclear morphology in progerin expressing cells
M. C. Lionetti, S. Bonfanti, M. R. Fumagalli +6
The nuclear morphology of eukaryotic cells is determined by the interplay between the lamina forming the nuclear skeleton, the chromatin inside the nucleus and the coupling with th…
Ideal circle microswimmers in crowded media
Oleksandr Chepizhko, Thomas Franosch
Microswimmers are exposed in nature to crowded environments and their transport properties depend in a subtle way on the interaction with obstacles. Here, we investigate a model fo…
Unjamming of active rotators
Linda Ravazzano, Maria Chiara Lionetti, Maria Rita Fumagalli +5
Active particle assemblies can exhibit a wide range of interesting dynamical phases depending on internal parameters such as density, adhesion strength or self-propulsion. Active s…
From jamming to collective cell migration through a boundary induced transition
Oleksandr Chepizhko, Maria Chiara Lionetti, Chiara Malinverno +3
Cell monolayers provide an interesting example of active matter, exhibiting a phase transition from a flowing to jammed state as they age. Here we report experiments and numerical…
Universal statistics of epithelial tissue topology
Abdulaziz Abdullah, Demetris Avraam, Oleksandr Chepizhko +4
Cells forming various epithelial tissues have a strikingly universal distribution for the number of their edges. It is generally assumed that this topological feature is predefined…
Bursts of activity in collective cell migration
Oleksandr Chepizhko, Costanza Giampietro, Eleonora Mastrapasqua +11
Dense monolayers of living cells display intriguing relaxation dynamics, reminiscent of soft and glassy materials close to the jamming transition, and migrate collectively when spa…
Emergent vortices in populations of colloidal rollers
Antoine Bricard, Jean-Baptiste-Caussin, Debasish Das +7
Coherent vortical motion has been reported in a wide variety of populations including living organisms (bacteria, fishes, human crowds) and synthetic active matter (shaken grains,…
Active particles in heterogeneous media display new physics: existence of optimal noise and absence of bands and long-range order
Oleksandr Chepizhko, Fernando Peruani
We present a detailed study of the large-scale collective properties of self-propelled particles (SPPs) moving in two-dimensional heterogeneous space. The impact of spatial heterog…
Diffusion, subdiffusion, and trapping of active particles in heterogeneous media
Oleksandr Chepizhko, Fernando Peruani
We study the transport properties of a system of active particles moving at constant speed in an heterogeneous two-dimensional space. The spatial heterogeneity is modeled by a rand…
Optimal noise maximizes collective motion in heterogeneous media
Oleksandr Chepizhko, Eduardo G. Altmann, Fernando Peruani
We study the effect of spatial heterogeneity on the collective motion of self-propelled particles (SPPs). The heterogeneity is modeled as a random distribution of either static or…
The microscopic phase density functional approach to the construction of the kinetic and hydrodynamic description for the system of self-propelled particles
Oleksandr Chepizhko, Vladimir Kulinskii
We use the method of the microscopic phase density to get the kinetic equation for the system of self-propelled particles with Vicsek-like alignment rule. The hydrodynamic equation…