Volume 124, Number 4, November 2018
|Number of page(s)||6|
|Section||Physics of Gases, Plasmas and Electric Discharges|
|Published online||12 December 2018|
Small systems of laser-driven active Brownian particles: Evolution and dynamic entropy
1 Joint Institute for High Temperatures - Moscow, Russia
2 Moscow Institute of Physics and Technology - Moscow, Russia
3 Center for Astrophysics, Space Physics, and Engineering Research (CASPER), Baylor University Waco, TX, USA
Received: 6 August 2018
Accepted: 14 November 2018
We investigate the evolution of small systems of strongly interacting active Brownian particles. Metal-coated grains of micron size levitating in gas-discharge plasma are irradiated by laser inducing their active motion. We present the experimentally obtained functions of mean first-passage time dynamic entropy (MFPT) for each grain in a two-dimensional system for various values of their kinetic temperature, and also the values of the fractal dimension of trajectories of these systems and their localization area and match them to the point of transformation of the system.
PACS: 52.27.Lw – Dusty or complex plasmas; plasma crystals
© EPLA, 2018
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