78 citations · 153 across the 13 of their papers we have counts for
13 papers
Hydrodynamics of Cooperation and Self-Interest in a Two-Population Occupation Model
Jerome Garnier-Brun, Ruben Zakine, Michael Benzaquen
We study the hydrodynamics of a system of agents who optimize either their individual utility (self-interest) or the collective welfare (cooperation). When agents act selfishly, th…
On the relative packing densities of pistachios and pistachio shells
Ruben Zakine, Michael Benzaquen
Given an appetizer bowl full of pistachios, what is the optimal size of the container -- neither too small, nor too big -- needed for accommodating the resulting non-edibl…
Wetting by active fluids
Yongfeng Zhao, Ruben Zakine, Adrian Daerr +3
The Young-Dupré equation is a cornerstone of the theory of capillary and wetting phenomena that governs the shape of droplets adsorbed on surfaces in equilibrium. But many living a…
Evolving motility of active droplets is captured by a self-repelling random walk model
Wenjun Chen, Adrien Izzet, Ruben Zakine +3
Swimming droplets are a class of active particles whose motility changes as a function of time due to shrinkage and self-avoidance of their trail. Here we combine experiments and t…
Unveiling the Phase Diagram and Reaction Paths of the Active Model B with the Deep Minimum Action Method
Ruben Zakine, Eric Simonnet, Eric Vanden-Eijnden
Nonequilibrium phase transitions are notably difficult to analyze because their mechanisms depend on the system's dynamics in a complex way due to the lack of time-reversal symmetr…
Socioeconomic agents as active matter in nonequilibrium Sakoda-Schelling models
Ruben Zakine, Jerome Garnier-Brun, Antoine-Cyrus Becharat +1
How robust are socioeconomic agent-based models with respect to the details of the agents' decision rule? We tackle this question by considering an occupation model in the spirit o…
Minimum Action Method for Nonequilibrium Phase Transitions
Ruben Zakine, Eric Vanden-Eijnden
First-order nonequilibrium phase transitions observed in active matter, fluid dynamics, biology, climate science, and other systems with irreversible dynamics are challenging to an…
Spatial Organization of Active Particles with Field Mediated Interactions
Ruben Zakine, Jean-Baptiste Fournier, Frédéric van Wijland
We consider a system of independent point-like particles performing a Brownian motion while interacting with a Gaussian fluctuating background. These particles are in addition endo…
Surface Tensions between Active Fluids and Solid Interfaces: bare vs dressed
Ruben Zakine, Yongfeng Zhao, Miloš Knežević +4
We analyze the surface tension exerted at the interface between an active fluid and a solid boundary in terms of tangential forces. Focusing on active systems known to possess an e…
Interaction and self-assembly of membrane-binding and membrane-excluding colloids embedded in lamellar phases
Ruben Zakine, Dasith de Silva Edirimuni, Doru Constantin +2
Within the framework of a discrete Gaussian model, we present analytical results for the interaction induced by a lamellar phase between small embedded colloids. We consider the tw…
Field-Embedded Particles Driven by Active Flips
Ruben Zakine, Jean-Baptiste Fournier, Frédéric Van Wijland
Systems of independent active particles embedded into a fluctuating environment are relevant to many areas of soft-matter science. We use a minimal model of noninteracting spin-car…
Stochastic Stirling engine operating in contact with active baths
Ruben Zakine, Alexandre Solon, Todd Gingrich +1
A Stirling engine made of a colloidal particle in contact with a nonequilibrium bath is considered and analyzed with the tools of stochastic energetics. We model the bath by non Ga…
The elusive synchrotron precursor of collisionless shocks
Ruben Zakine, Martin Lemoine
Most of the plasma microphysics which shapes the acceleration process of particles at collisionless shock waves takes place in the cosmic-ray precursor, through the interaction of…