Flocking without alignment interactions in attractive active brownian particles

L Caprini, H Löwen - Physical Review Letters, 2023 - APS
Within a simple model of attractive active Brownian particles, we predict flocking behavior
and challenge the widespread idea that alignment interactions are necessary to observe this …

Emergence of active turbulence in microswimmer suspensions due to active hydrodynamic stress and volume exclusion

K Qi, E Westphal, G Gompper, RG Winkler - Communications Physics, 2022 - nature.com
Microswimmers exhibit an intriguing, highly-dynamic collective motion with large-scale
swirling and streaming patterns, denoted as active turbulence–reminiscent of classical high …

Disordered collective motion in dense assemblies of persistent particles

YE Keta, RL Jack, L Berthier - Physical Review Letters, 2022 - APS
We explore the emergence of nonequilibrium collective motion in disordered nonthermal
active matter when persistent motion and crowding effects compete, using simulations of a …

Role of rotational inertia for collective phenomena in active matter

L Caprini, RK Gupta, H Löwen - Physical Chemistry Chemical Physics, 2022 - pubs.rsc.org
We investigate the effect of rotational inertia on the collective phenomena of underdamped
active systems and show that the increase of the moment of inertia of each particle favors …

Spatial velocity correlations in inertial systems of active Brownian particles

L Caprini, UMB Marconi - Soft Matter, 2021 - pubs.rsc.org
Recently, it has been discovered that systems of active Brownian particles (APB) at high
density organise their velocities into coherent domains showing large spatial structures in …

Entropy production and collective excitations of crystals out of equilibrium: The concept of entropons

L Caprini, U Marini Bettolo Marconi, H Löwen - Physical Review E, 2023 - APS
We study the collective vibrational excitations of crystals under out-of-equilibrium steady
conditions that give rise to entropy production. Their excitation spectrum comprises …

When an active bath behaves as an equilibrium one

SS Khali, F Peruani, D Chaudhuri - Physical Review E, 2024 - APS
Active scalar baths consisting of active Brownian particles are characterized by a non-
Gaussian velocity distribution, a kinetic temperature, and a diffusion coefficient that scale …

Correlated escape of active particles across a potential barrier

L Caprini, F Cecconi… - The Journal of Chemical …, 2021 - pubs.aip.org
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 …

Mode-coupling theory for mixtures of athermal self-propelled particles

VE Debets, L Janssen - The Journal of Chemical Physics, 2023 - pubs.aip.org
Dense or glassy active matter, as a result of its remarkable resemblance to passive glass-
forming materials, is enjoying increasing scientific interest. To better grasp the subtle effect …

[HTML][HTML] How to define temperature in active systems?

L Hecht, L Caprini, H Löwen, B Liebchen - The Journal of Chemical …, 2024 - pubs.aip.org
We are used to measuring temperature with a thermometer, and we know from everyday life
that different types of thermometers measure the same temperature. This experience can be …