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Active Crystals of Self-Propelled Spheres: Insights from Computer Simulations

This research, conducted by Seth Raden at Brandeis University, explores self-propelled spheres in 2D through computer simulations. It predicts a new form of matter - an active liquid crystal. The study highlights the structure factor of an active crystal exhibiting crystallinity, demonstrating the instantaneous speeds of its particles, which reveal the inhomogeneous motion within the crystal. Additionally, it illustrates the diffusion process of particles in the active crystal, akin to a Fluorescence Recovery After Photobleaching (FRAP) experiment, providing meaningful insights into dynamic behaviors.

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Active Crystals of Self-Propelled Spheres: Insights from Computer Simulations

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  1. Active Crystals of Self Propelled Spheres Seth Raden, Brandeis University, DMR 0820492 (b) (a) Computer simulations of self propelled spheres in 2d predict a new form of matter: an active liquid crystal. (a) The structure factor for an example active crystal showing crystallinity. (b) Instantaneous speed of particles within the system, illustrating the inhomogeneous motion within the crystal. (c) Particles in the active crystal undergo diffusion. The image shows the analog of a FRAP experiment. The particles which start in the center are labeled blue; the image to the right shows a snapshot after evolution of the dynamics. (c)

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