2.2k citations · 14.6k across the 219 of their papers we have counts for
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Phase Coexistence in Nonreciprocal Quorum-Sensing Active Matter
Yu Duan, Jaime Agudo-Canalejo, Ramin Golestanian +1
Motility and nonreciprocity are two primary mechanisms for self-organization in active matter. In a recent study [Phys. Rev. Lett. 131, 148301 (2023)], we explored their joint infl…
Isovolumetric dividing active matter
Samantha R. Lish, Lukas Hupe, Ramin Golestanian +1
We introduce and theoretically investigate a minimal particle-based model for a new class of active matter where particles exhibit directional, volume-conserving division in confin…
A minimal model of smoothly dividing disk-shaped cells
Lukas Hupe, Yoav G. Pollack, Jonas Isensee +3
Replication through cell division is one of the most fundamental processes of life and a major driver of dynamics in systems ranging from bacterial colonies to embryogenesis, tissu…
Fluctuation Dissipation Relations for Active Field Theories
Martin Kjøllesdal Johnsrud, Ramin Golestanian
Breakdown of time-reversal symmetry is a defining property of non-equilibrium systems, such as active matter, which is composed of units that consume energy. We employ a formalism…
Enhanced stability and chaotic condensates in multi-species non-reciprocal mixtures
Laya Parkavousi, Navdeep Rana, Ramin Golestanian +1
Random non-reciprocal interactions between a large number of conserved densities are shown to enhance the stability of the system towards pattern formation. The enhanced stability…
Mechanistic rules for de novo design of enzymes
Michalis Chatzittofi, Jaime Agudo-Canalejo, Ramin Golestanian
Enzymes are nano-scale machines that have evolved to drive chemical reactions out of equilibrium in the right place at the right time. Given the complexity and specificity of enzym…
Thermodynamic inference of correlations in nonequilibrium collective dynamics
Michalis Chatzittofi, Ramin Golestanian, Jaime Agudo-Canalejo
The theory of stochastic thermodynamics has revealed many useful fluctuation relations, with the thermodynamic uncertainty relation (TUR) being a theorem of major interest. When ma…
Defect interactions in the non-reciprocal Cahn-Hilliard model
Navdeep Rana, Ramin Golestanian
We present a computational study of the pairwise interactions between defects in the recently introduced non-reciprocal Cahn-Hilliard model. The evolution of a defect pair exhibits…
Hydrodynamically consistent many-body Harada-Sasa relation
Ramin Golestanian
The effect of hydrodynamic interactions on the non-equilibrium stochastic dynamics of particles -- arising from the conservation of momentum in the fluid medium -- is examined in t…
Nonlinear response theory of molecular machines
Michalis Chatzittofi, Jaime Agudo-Canalejo, Ramin Golestanian
Chemical affinities are responsible for driving active matter systems out of equilibrium. At the nano-scale, molecular machines interact with the surrounding environment and are su…
Chirotactic response of microswimmers in fluids with odd viscosity
Yuto Hosaka, Michalis Chatzittofi, Ramin Golestanian +1
Odd viscosity is a property of chiral active fluids with broken time-reversal and parity symmetries. We show that the flow of such a fluid around a rotating axisymmetric body is ex…
Emergent polar order in non-polar mixtures with non-reciprocal interactions
Giulia Pisegna, Suropriya Saha, Ramin Golestanian
Phenomenological rules that govern the collective behaviour of complex physical systems are powerful tools because they can make concrete predictions about their universality class…
Molecular Dynamics Simulations of Microscopic Structural Transition and Macroscopic Mechanical Properties of Magnetic Gels
Xuefeng Wei, Gaspard Junot, Ramin Golestanian +4
Magnetic gels with embedded micro/nano-sized magnetic particles in crosslinked polymer networks can be actuated by external magnetic fields, with changes in their internal microsco…
Collective self-caging of active filaments in virtual confinement
Maximilian Kurjahn, Leila Abbaspour, Franziska Papenfuß +4
Motility coupled to responsive behavior is essential for many microorganisms to seek and establish appropriate habitats. One of the simplest possible responses, reversing the direc…
Nonreciprocal collective dynamics in a mixture of phoretic Janus colloids
Gennaro Tucci, Ramin Golestanian, Suropriya Saha
A multicomponent mixture of Janus colloids with distinct catalytic coats and phoretic mobilities is a promising theoretical system to explore the collective behavior arising from n…
Chemotactic particles as strong electrolytes: Debye-Hückel approximation and effective mobility law
Pierre Illien, Ramin Golestanian
We consider a binary mixture of chemically active particles, that produce or consume solute molecules, and that interact with each other through the long-range concentrations field…
Anomalous fluctuations in a droplet of chemically active colloids or enzymes
K. R. Prathyusha, Suropriya Saha, Ramin Golestanian
Chemically active colloids or enzymes cluster into dense droplets driven by their phoretic response to collectively generated chemical gradients. Employing Brownian dynamics simula…