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- W4384644518 abstract "To investigate the impact of non-linear interactions on dynamic coarse graining, we study a simplified model system, featuring a tracer particle in a complex environment. Using a projection operator formalism and computer simulations, we systematically derive generalized Langevin equations describing the dynamics of this particle. We compare different kinds of linear and non-linear coarse-graining procedures to understand how non-linearities enter reconstructed generalized Langevin equations and how they influence the coarse-grained dynamics. For non-linear external potentials, we show analytically and numerically that the non-Gaussian parameter and the incoherent intermediate scattering function will not be correctly reproduced by the generalized Langevin equation if a linear projection is applied. This, however, can be overcome by using non-linear projection operators. We also study anharmonic coupling between the tracer and the environment and demonstrate that the reconstructed memory kernel develops an additional trap-dependent contribution. Our study highlights some open challenges and possible solutions in dynamic coarse graining." @default.
- W4384644518 created "2023-07-19" @default.
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- W4384644518 date "2023-07-16" @default.
- W4384644518 modified "2023-10-16" @default.
- W4384644518 title "Dynamic Coarse-Graining of Linear and Non-Linear Systems: Mori-Zwanzig Formalism and Beyond" @default.
- W4384644518 doi "https://doi.org/10.48550/arxiv.2307.08143" @default.
- W4384644518 hasPublicationYear "2023" @default.
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