Multiparticle collision simulations of two-dimensional one-component plasmas: Anomalous transport and dimensional crossovers

Physical Review. E
Pierfrancesco Di CintioGuido Ciraolo

Abstract

By means of hybrid multiparticle collsion-particle-in-cell (MPC-PIC) simulations we study the dynamical scaling of energy and density correlations at equilibrium in moderately coupled two-dimensional (2D) and quasi-one-dimensional (1D) plasmas. We find that the predictions of nonlinear fluctuating hydrodynamics for the structure factors of density and energy fluctuations in 1D systems with three global conservation laws hold true also for 2D systems that are more extended along one of the two spatial dimensions. Moreover, from the analysis of the equilibrium energy correlators and density structure factors of both 1D and 2D neutral plasmas, we find that neglecting the contribution of the fluctuations of the vanishing self-consistent electrostatic fields overestimates the interval of frequencies over which the anomalous transport is observed. Such violations of the expected scaling in the currents correlation are found in different regimes, hindering the observation of the asymptotic scaling predicted by the theory.

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Citations

Jun 18, 2021·Physical Review. E·Rongxiang LuoStefano Lepri
Jun 18, 2021·Physical Review. E·Yanjiang Guo, Lei Wang

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