Long-range translational order and hyperuniformity in two-dimensional chiral active crystal

Physical Review Research, Journal Year: 2025, Volume and Issue: 7(1)

Published: Feb. 28, 2025

We numerically study two-dimensional athermal chiral active particles at high densities. The in this system perform the circular motion with frequency Ω. show that crystallizes densities even two dimensions, accompanied by true long-range translational order. This is due to anomalous suppression of displacement fluctuations associated hyperuniformity. These findings can be explained using an elastic theory quantitatively. Surprisingly, crystals become unstable and melt limit Ω=0, for spatial dimension four or less. result a mechanism akin quenched random systems which lower critical four. Published American Physical Society 2025

Language: Английский

A computer simulation study of a chiral active ring polymer

The Journal of Chemical Physics, Journal Year: 2024, Volume and Issue: 161(18)

Published: Nov. 8, 2024

We investigate a ring polymer under the influence of chiral active Brownian forces in two dimensions using coarse-grained computer simulations. observe non-monotonic behavior radius gyration an as function force. However, shrinkage intermediate strength becomes more pronounced presence forces, and is monotonic at given activity level angular frequency controlling direction The distribution gyration, inter-monomer distance, radial suggest that monomers come close to each other, eventually leading ring. Moreover, bond-correlation suggests chirality introduces local folding monomers. Furthermore, diameter correlation function, we show performs tank-treading motion with following power-law relation force exponent 3/2. mean squared displacement further assists dynamics by exhibiting oscillatory behavior.

Language: Английский