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- W3103448972 abstract "Generalized Langevin dynamics (GLD) arise in the modeling of a number of systems, ranging from structured fluids that exhibit a viscoelastic mechanical response, to biological systems, and other media that exhibit anomalous diffusive phenomena. Molecular dynamics (MD) simulations that include GLD in conjunction with external and/or pairwise forces require the development of numerical integrators that are efficient, stable, and have known convergence properties. In this article, we derive a family of extended variable integrators for the Generalized Langevin equation with a positive Prony series memory kernel. Using stability and error analysis, we identify a superlative choice of parameters and implement the corresponding numerical algorithm in the LAMMPS MD software package. Salient features of the algorithm include exact conservation of the first and second moments of the equilibrium velocity distribution in some important cases, stable behavior in the limit of conventional Langevin dynamics, and the use of a convolution-free formalism that obviates the need for explicit storage of the time history of particle velocities. Capability is demonstrated with respect to accuracy in numerous canonical examples, stability in certain limits, and an exemplary application in which the effect of a harmonic confining potential is mapped onto a memory kernel." @default.
- W3103448972 created "2020-11-23" @default.
- W3103448972 creator A5013279300 @default.
- W3103448972 creator A5051638392 @default.
- W3103448972 date "2013-07-24" @default.
- W3103448972 modified "2023-10-18" @default.
- W3103448972 title "Numerical integration of the extended variable generalized Langevin equation with a positive Prony representable memory kernel" @default.
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- W3103448972 doi "https://doi.org/10.1063/1.4815917" @default.
- W3103448972 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/23901960" @default.
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