228 citations · 1.3k across the 63 of their papers we have counts for
73 papers
Metastability and nucleation of bubbles in active chiral systems
Raphael Maire, Alessandro Petrini, Umberto Marini Bettolo Marconi +1
Bubbles frequently emerge in dense chiral active fluids, yet it remains unclear whether they result from an instability of the homogeneous state or from rare nucleation events with…
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…
Active embracement enables autonomous tweezing in active star polymers
Marco Musacchio, Davide Breoni, Iman Abdoli +3
The capacity for autonomous structural reconfiguration is a defining trait of living systems, yet it remains elusive in artificial active matter. Here, we report the discovery of a…
Jerky Motion of Active Granular Particles
Alexander P. Antonov, Marco Musacchio, Hartmut Löwen +1
Abrupt transitions between rest and motion can render the standard Newtonian description -- based on position, velocity, and acceleration -- incomplete, requiring higher-order deri…
Magnetic active matter across scales
Francisca Guzmán-Lastra, Margaret Rosenberg, Marco Musacchio +2
Magnetic interactions provide a versatile and powerful tool for controlling and organizing active matter, where individual units continuously consume energy to drive autonomous mot…
Curvature-driven wall accumulation in chiral active particles
Alessandro Petrini, Raphaël Maire, Umberto Marini Bettolo Marconi +1
We study a dilute system of non-motile chiral active particles confined in geometries ranging from straight channels to circular enclosures. Activity is introduced through chiral p…
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…
Sparkling bubbles in chiral active fluids
Alessandro Petrini, Raphaël Maire, Umberto Marini Bettolo Marconi +1
We study an inertial chiral active fluid, formed by repulsive particles that transfer angular momentum through odd interactions, i.e. transverse forces. Chirality induces an inhomo…
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…
Emergent hydrodynamics of chiral active fluids: vortices, bubbles and odd diffusion
Umberto Marini Bettolo Marconi, Alessandro Petrini, Raphaël Maire +1
Starting from a microscopic multiparticle Langevin equation, we systematically derive a hydrodynamic description in terms of density and momentum fields for chiral active particles…
Cooling mechanism controls motility-induced phase separation in inertial active liquids
Manuel Mayo, Lorenzo Caprini, María Isabel García de Soria +4
Motility-induced phase separation (MIPS) is a central collective phenomenon in active matter, theoretically established in the overdamped regime. We discover that the dynamical ori…
Circling crystals in chiral active matter with self-alignment
Marco Musacchio, Alexander P. Antonov, Hartmut Löwen +1
We study a crystal composed of active units governed by self-alignment and chirality. The first mechanism acts as an effective torque that aligns the particle orientation with its…
Modeling chiral active particles: from circular motion to odd interactions
Lorenzo Caprini, Alessandro Petrini, Umberto Marini Bettolo Marconi
In this paper, we discuss microscopic models for chiral active particles, i.e., rotating active units that exhibit circular or spinning motion. While non-chiral active particles ar…
Optimal area exploration by resetting active particles
Kristian Stølevik Olsen, Hartmut Löwen, Lorenzo Caprini
Identifying optimal strategies for efficient spatial exploration is crucial, both for animals seeking food and for robotic search processes, where maximizing the covered area is a…
Active particles in tunable compressible environments
Venkata Manikantha Sai Ganesh Tanuku, Isha Malhotra, Lorenzo Caprini +3
Active particles affect their environment as much as the environment affects their active motion. Here, we present an experimental system where both can be simultaneously adjusted…
Active thermodynamics of inertial chiral active gases: equation of state and edge currents
Lorenzo Caprini, Umberto Marini Bettolo Marconi, Benno Liebchen +1
One of the most fundamental quests in the physics of active matter concerns the existence of a comprehensive theory for its macroscopic properties, i.e. an ``active thermodynamics'…
Flocking as a second-order phase transition in self-aligning active crystals
Marco Musacchio, Alexander P. Antonov, Hartmut Löwen +1
We study a two-dimensional crystal composed of active units governed by self-alignment. This mechanism induces a torque that aligns a particle's orientation with its velocity and l…
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…
Self-alignment and anti-self-alignment suppress motility-induced phase separation in active systems
Marco Musacchio, Alexander P. Antonov, Hartmut Löwen +1
In this article, we investigate the impact of self-alignment and anti-self-alignment on collective phenomena in dense active matter. These mechanisms correspond to effective torque…
Self-sustained frictional cooling in active matter
Alexander P. Antonov, Marco Musacchio, Hartmut Löwen +1
Cooling processes in nature are typically generated by external contact with a cold reservoir or bath. According to the laws of thermodynamics, the final temperature of a system is…
Odd Active Solids: Vortices, Velocity Oscillations and Dissipation-Free Modes
Lorenzo Caprini, Umberto Marini Bettolo Marconi
A wide range of physical and biological systems, including colloidal magnets, granular spinners, and starfish embryos, are characterized by strongly rotating units that give rise t…
Self-reconfiguring colloidal active matter
Stefania Ketzetzi, Lorenzo Caprini, Vivien Willems +3
Cells and microorganisms employ dynamic shape changes to enable steering and avoidance for efficient spatial exploration and collective organization. In contrast, active colloids,…
Spontaneous generation of angular momentum in chiral active crystals
Umberto Marini Bettolo Marconi, Lorenzo Caprini
We study a two-dimensional chiral active crystal composed of underdamped chiral active particles. These particles, characterized by intrinsic handedness and persistence, interact v…
Spontaneous self-wrapping in chiral active polymers
Lorenzo Caprini, Iman Abdoli, Umberto Marini Bettolo Marconi +1
Biological organisms often have elongated, flexible structures with some degree of chirality in their bodies or movements. In nature, these organisms frequently take advantage of s…