88 citations · 460 across the 22 of their papers we have counts for
10 papers · 1 filter
Topological defects in multi-layered swarming bacteria
Victor Yashunsky, Daniel J. G. Pearce, Gil Ariel +1
Topological defects, which are singular points in a director field, play a major role in shaping active systems. Here, we experimentally study topological defects and the flow patt…
Detecting and characterizing phase transitions in active matter using entropy
Benjamin Sorkin, Avraham Be'er, Haim Diamant +1
A major challenge in the study of active matter lies in quantitative characterization of phases and transitions between them. We show how the entropy of a collection of active obje…
Turbulence-induced clustering in compressible active fluids
Vasco M. Worlitzer, Gil Ariel, Avraham Be'er +3
We study a novel phase of active polar fluids, which is characterized by the continuous creation and destruction of dense clusters due to self-sustained turbulence. This state aris…
Motility-Induced Clustering and Meso-Scale Turbulence in Active Polar Fluids
Vasco M. Worlitzer, Gil Ariel, Avraham Be'er +3
Meso-scale turbulence was originally observed experimentally in various suspensions of swimming bacteria, as well as in the collective motion of active colloids. The corresponding…
Heterogeneous bacterial swarms with mixed lengths
Shlomit Peled, Shawn D. Ryan, Sebastian Heidenreich +3
Heterogeneous systems of active matter exhibit a range of complex emergent dynamical patterns. In particular, it is difficult to predict the properties of the mixed system based on…
A phase diagram for bacterial swarming
Avraham Be`er, Bella Ilkanaiv, Renan Gross +4
Bacterial swarming is a rapid mass-migration, in which thousands of cells spread collectively to colonize a surface. Physically, swarming is a natural example of active particles t…
Competition between condensation of monovalent and multivalent ions in DNA aggregation
Yoram Burak, Gil Ariel, David Andelman
We discuss the distribution of ions around highly charged PEs when there is competition between monovalent and multivalent ions, pointing out that in this case the number of conden…
Onset of DNA Aggregation in Presence of Monovalent and Multivalent Counterions
Y. Burak, G. Ariel, D. Andelman
We address theoretically aggregation of DNA segments by multivalent polyamines such as spermine and spermidine. In experiments, the aggregation occurs above a certain threshold con…
Polyelectrolyte Persistence Length: Attractive Effect of Counterion Correlations and Fluctuations
Gil Ariel, David Andelman
The persistence length of a single, strongly charged, stiff polyelectrolyte chain is investigated theoretically. Path integral formulation is used to obtain the effective electrost…
Kinetics of Surfactant Adsorption: The Free Energy Approach
H. Diamant, G. Ariel, D. Andelman
We review the free energy approach to the kinetics of surfactant adsorption at fluid/fluid interfaces. The formalism is applied to several systems. For non-ionic surfactant solutio…