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Abstract: We propose a computational method to simulate anomalous self-diffusion in asimple liquid. The method is based on a molecular dynamics simulation on whichwe impose the following two conditions: firstly, the inter-particle interactionis described by a soft-core potential and secondly, the system is forced out ofequilibrium. The latter can be achieved by subjecting the system to changes inthe length scale at intermittent times. In many respects, our simulation systembears resemblance to slowly driven sandpile models displaying self-organisedcriticality. We find non-Gaussian single time step displacement distributionsduring the out-of-equilibrium time periods of the simulation.



Author: Simon Standaert, Jan Ryckebusch, Lesley De Cruz

Source: https://arxiv.org/







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