We study a 2D Hamiltonian fluid made of particles carrying spins coupled to their velocities.
At low temperatures and intermediate densities, this conservative system exhibits phase …

Inspired by groups of animals and robots, we study the collective dynamics of large numbers
of active particles, each one trying to get to its own randomly placed target, while avoiding …

We consider a class of nonstandard, two-dimensional Hamiltonian models that may show
features of active particle dynamics, and therefore, we refer to these models as active …

Monte Carlo simulations were used to study the assembly of model binary mixtures whose
pure components have either distinct or similar crystal order symmetry. Specifically, we …

We study the effect of particle mobility on phase transitions in a spin fluid in two dimensions.
The presence of a phase transition of the BKT universality class is shown in an off-lattice …

Using analytic and numerical methods, we study a 2d Hamiltonian model of interacting
particles carrying ferro-magnetically coupled continuous spins which are also locally …

The past years saw a rising interest in classical magnets with two-dimensional unit spins
moving in two spatial dimensions. That interest is partially due to the fact that such mobile …

The phase of matter is the state of a system in a region on a macroscopic scale. At this
macroscopic scale, in equilibrium, physical properties of the system are homogeneous …

We study the system of colloid active nematic liquid crystals evolving with transformation of
the structure of surface linear topological defects. We estimate numerically the SO (2) …

Collective motion, the spontaneous ordering of the velocities across a macroscopic system,
is a hallmark of living systems like flocks of birds. It is captured by models of self-propelled …