228 citations · 1.3k across the 63 of their papers we have counts for
35 papers · 1 filter
Critical escape dynamics of an active particle moving on curved surfaces
Maxim Root, Hartmut Löwen, Peter Sollich +2
On the macroscopic scale, active (self-propelled) objects moving through complex environments are often subject to effects arising from both the curvature of the surrounding surfac…
A particle-resolved rheological study of chirality transfer and odd transport
Rémi Goerlich, Alexander P. Antonov, Kristian Stølevik Olsen +4
Chirality, or the breaking of mirror symmetry, appears across all scales in nature, from molecular conformations to the dynamics of bacterial collectives. Environments composed of…
Kinetic Theory of Chiral Active Disks: Odd Transport and Torque Density
Raphael Maire, Alessandro Petrini, Umberto Marini Bettolo Marconi +1
Parity-odd transport is a central signature of chiral fluids, yet analytical predictions are sparse. Here, we introduce a minimal two-dimensional hard-disk gas in which chirality a…
Active Gaussian Network Model: a non-equilibrium description of protein fluctuations and allosteric behavior
Giulio Costantini, Lorenzo Caprini, Umberto Marini Bettolo Marconi +1
Understanding the link between structure and function in proteins is fundamental in molecular biology and proteomics. A central question in this context is whether allostery - wher…
Emergent memory from tapping collisions in active granular matter
Lorenzo Caprini, Anton Ldov, Rahul Kumar Gupta +4
In an equilibrium thermal environment, random elastic collisions between background particles and a tracer establish the picture of Brownian motion fulfilling the celebrated Einste…
Entropy production and collective excitations of crystals out of equilibrium: the concept of entropons
Lorenzo Caprini, Umberto Marini Bettolo Marconi, Hartmut Löwen
We study the collective vibrational excitations of crystals under out-of-equilibrium steady conditions that give rise to entropy production. Their excitation spectrum comprises equ…
Inhomogeneous entropy production in active crystals with point imperfections
Lorenzo Caprini, Hartmut Löwen, Umberto Marini Bettolo Marconi
The presence of defects in solids formed by active particles breaks their discrete translational symmetry. As a consequence, many of their properties become space-dependent and dif…
The Many Faces of Fluctuation-Dissipation Relations Out of Equilibrium
Marco Baldovin, Lorenzo Caprini, Andrea Puglisi +2
In this paper, we offer to the reader an essential review of the theory of Fluctuation-Dissipation Relations (FDR), from the first formulations due to Einstein and Onsager, to the…
Active particles driven by competing spatially dependent self-propulsion and external force
Lorenzo Caprini, Umberto Marini Bettolo Marconi, René Wittmann +1
We investigate how the competing presence of a nonuniform motility landscape and an external confining field affects the properties of active particles. We employ the active Ornste…
Correlated escape of active particles across a potential barrier
Lorenzo Caprini, Fabio Cecconi, Umberto Marini Bettolo Marconi
We study the dynamics of one-dimensional active particles confined in a double-well potential, focusing on the escape properties of the system, such as the mean escape time from a…
Excess and loss of entropy production for different levels of coarse-graining
Pierpaolo Bilotto, Lorenzo Caprini, Angelo Vulpiani
We investigate the effect of coarse-graining on the energetics properties of a system, focusing on entropy production. As a case of study, we consider a one-dimensional colloidal p…
Hydrodynamics of simple active liquids: the emergence of velocity correlations
Umberto Marini Bettolo Marconi, Andrea Puglisi, Lorenzo Caprini
We derive the Hydrodynamics for a system of N active, spherical, underdamped particles, interacting through conservative forces. At the microscopic level, we represent the evolutio…
A handy fluctuation-dissipation relation to approach generic noisy systems and chaotic dynamics
Marco Baldovin, Lorenzo Caprini, Angelo Vulpiani
We introduce a general formulation of the fluctuation-dissipation relations (FDR) holding also in far-from-equilibrium stochastic dynamics. A great advantage of this version of the…
Collective effects in confined Active Brownian Particles
Lorenzo Caprini, Claudio Maggi, Umberto Marini Bettolo Marconi
We investigate a two-dimensional system of active particles confined to a narrow annular domain. Despite the absence of explicit interactions among the velocities or the active for…
Generalized Fluctuation-Dissipation relations holding in non-equilibrium dynamics
Lorenzo Caprini
We derive generalized Fluctuation-Dissipation Relations (FDR) holding for a general stochastic dynamics that includes as subcases both equilibrium models for passive colloids and n…
Fluctuation-Dissipation Relations in Active Matter Systems
Lorenzo Caprini, Andrea Puglisi, Alessandro Sarracino
We investigate the non-equilibrium character of self-propelled particles through the study of the linear response of the active Ornstein-Uhlenbeck particle (AOUP) model. We express…
Inertial self-propelled particles
Lorenzo Caprini, Umberto Marini Bettolo Marconi
We study a self-propelled particle moving in a solvent with the active Ornstein Uhlenbeck dynamics in the underdamped regime to evaluate the influence of the inertia. We focus on t…
Active Matter at high density: velocity distribution and kinetic temperature
Lorenzo Caprini, Umberto Marini Bettolo Marconi
We consider the solid or hexatic non-equilibrium phases of an interacting two-dimensional system of Active Brownian Particles at high density and investigate numerically and theore…
Time-dependent properties of interacting active matter: dynamical behavior of one-dimensional systems of self-propelled particles
Lorenzo Caprini, Umberto Marini Bettolo Marconi
We study an interacting high-density one-dimensional system of self-propelled particles described by the Active Ornstein-Uhlenbeck particle (AOUP) model where, even in the absence…
Hidden velocity ordering in dense suspensions of self-propelled disks
Lorenzo Caprini, Claudio Maggi, Umberto Marini Bettolo Marconi +2
Recent studies of the phase diagram for spherical, purely repulsive, active particles established the existence of a transition from a liquid-like to a solid-like phase analogous t…
Diffusion properties of self-propelled particles in cellular flows
Lorenzo Caprini, Fabio Cecconi, Andrea Puglisi +1
We study the dynamics of a self-propelled particle advected by a steady laminar flow. The persistent motion of the self-propelled particle is described by an active Ornstein-Uhlenb…
Spontaneous velocity alignment in Motility-induced Phase Separation
Lorenzo Caprini, Umberto Marini Bettolo Marconi, Andrea Puglisi
We study a system of purely repulsive spherical self-propelled particles in the minimal set-up inducing Motility-Induced Phase Separation (MIPS). We show that, even if explicit ali…
How a local active force modifies the structural properties of polymers
Laura Natali, Lorenzo Caprini, Fabio Cecconi
We study the dynamics of a polymer, described as a variant of a Rouse chain, driven by an active terminal monomer (head). The local active force induces a transition from a globule…
A comparative study between two models of active cluster-crystals
Lorenzo Caprini, Emilio Hernàndez-Garcìa, Cristòbal Lòpez +1
We study a system of active particles with soft repulsive interactions that lead to an active cluster-crystal phase in two dimensions. We use two different modelizations of the act…