39 citations · 211 across the 16 of their papers we have counts for
16 papers
Stability and breakdown of chiral motion in non-reciprocal flocking
Aditya Kumar Dutta, Swarnajit Chatterjee, Matthieu Mangeat +1
We study a two-species Vicsek model with intra-species alignment and asymmetric inter-species couplings, where one species aligns with the other while the latter anti-aligns. Motiv…
Field-controlled interfacial transport and pinning in an active spin system
Mintu Karmakar, Matthieu Mangeat, Swarnajit Chatterjee +2
Field control provides a practical route to programmable active matter, yet how weak fields modify non-equilibrium coexistence and interfaces remains unclear. To address this, we s…
Stability of discrete-symmetry flocks: sandwich state, traveling domains and motility-induced pinning
Swarnajit Chatterjee, Mintu Karmakar, Matthieu Mangeat +2
Polar flocks in discrete active systems are often assumed to be robust, yet recent studies reveal their fragility under both imposed and spontaneous fluctuations. Here, we revisit…
Stability of flocking in the reciprocal two-species Vicsek model: Effects of relative population, motility, and noise
Aditya Kumar Dutta, Matthieu Mangeat, Heiko Rieger +2
Natural flocks need to cope with various forms of heterogeneities, for instance, their composition, motility, interaction, or environmental factors. Here, we study the effects of s…
Emergent complex phases in a discrete flocking model with reciprocal and non-reciprocal interactions
Matthieu Mangeat, Swarnajit Chatterjee, Jae Dong Noh +1
There is growing interest in multi-species active matter systems with reciprocal and non-reciprocal interactions. While such interactions have been explored in continuous symmetry…
Jamming and flocking in the restricted active Potts model
Mintu Karmakar, Swarnajit Chatterjee, Matthieu Mangeat +2
We study the active Potts model with either site occupancy restriction or on-site repulsion to explore jamming and kinetic arrest in a flocking model. The incorporation of such vol…
How stickiness can speed up diffusion in confined systems
Arthur Alexandre, Matthieu Mangeat, Thomas Guérin +1
The paradigmatic model for heterogeneous media used in diffusion studies is built from reflecting obstacles and surfaces. It is well known that the crowding effect produced by thes…
Steady state of overdamped particles in the non-conservative force field of a simple non-linear model of optical trap
M. Mangeat, T. Guérin, D. S. Dean
Optically trapped particles are often subject to a non-conservative scattering force arising from radiation pressure. In this paper we present an exact solution for the steady stat…
Flocking and reorientation transition in the 4-state active Potts model
Swarnajit Chatterjee, Matthieu Mangeat, Raja Paul +1
We study the active 4-state Potts model (APM) on the square lattice in which active particles have four internal states corresponding to the four directions of motion. A local alig…
The narrow escape problem in a circular domain with radial piecewise constant diffusivity
Matthieu Mangeat, Heiko Rieger
The stochastic motion of particles in living cells is often spatially inhomogeneous with a higher effective diffusivity in a region close to the cell boundary due to active transpo…
The role of non-conservative scattering forces and damping on Brownian particles in optical traps
Matthieu Mangeat, Yacine Amarouchene, Yann Louyer +2
We consider a model of a particle trapped in a harmonic optical trap but with the addition of a non-conservative radiation induced force. This model is known to correctly describe…
Nonequilibrium dynamics induced by scattering forces for optically trapped nanoparticles in strongly inertial regimes
Yacine Amarouchene, Matthieu Mangeat, Benjamin Vidal Montes +4
As a first approximation, the forces acting on optically trapped particles are commonly assumed to be conservative. The influence of the nonconservative force has been shown to be…
Dispersion in two-dimensional periodic channels with discontinuous profiles
M. Mangeat, T. Guérin, D. S. Dean
The effective diffusivity of Brownian tracer particles confined in periodic micro-channels is smaller than the microscopic diffusivity due to entropic trapping. Here, we study diff…
Dispersion in two dimensional channels - the Fick-Jacobs approximation revisited
M. Mangeat, T. Guérin, D. S. Dean
We examine the dispersion of Brownian particles in a symmetric two dimensional channel, this classical problem has been widely studied in the literature using the so called Fick-Ja…
Geometry controlled dispersion in periodic corrugated channels
M. Mangeat, T. Guérin, D. S. Dean
The effective diffusivity of tracer particles diffusing in periodically corrugated axisymmetric two and three dimensional channels is studied. The majority of previous studie…
Quantitative approximation schemes for glasses
Matthieu Mangeat, Francesco Zamponi
By means of a systematic expansion around the infinite-dimensional solution, we obtain an approximation scheme to compute properties of glasses in low dimensions. The resulting equ…