Wake-mediated propulsion of an upstream particle in two-dimensional plasma crystals
arXiv:1701.03270 · doi:10.1103/PhysRevLett.118.075002
Abstract
The wake-mediated propulsion of an "extra" particle in a channel of two neighboring rows of a two-dimensional plasma crystal, observed experimentally by Du et al. [Phys. Rev. E 89, 021101(R) (2014)], is explained in simulations and theory. We use the simple model of a pointlike ion wake charge to reproduce this intriguing effect in simulations, allowing for a detailed investigation and a deeper understanding of the underlying dynamics. We show that the nonreciprocity of the particle interaction, owing to the wake charges, is responsible for a broken symmetry of the channel that enables a persistent self-propelled motion of the extra particle. We find good agreement of the terminal extra-particle velocity with our theoretical considerations and with experiments.
arXiv comment7 pages, 4 figures, PRL (https://journals.aps.org/prl/), updated version with correct author affiliations
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Cited by in corpus (4)
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