The Generalized Langevin Equation: An efficient approach to non-equilibrium molecular dynamics of open systems

Abstract

The Generalized Langevin Equation (GLE) has been recently suggested to simulate the time evolution of classical solid and molecular systems when considering general non-equilibrium processes. In this approach, a part of the whole system (an open system), which interacts and exchanges energy with its dissipative environment, is studied. Because the GLE is derived by projecting out exactly the harmonic environment, the coupling to it is realistic, while the equations of motion are non-Markovian. Although the GLE formalism has already found promising applications, e.g., in nanotribology and as a powerful thermostat for equilibration in classical molecular dynamics simulations, efficient algorithms to solve the GLE for realistic memory kernels are highly non-trivial, especially if the memory kernels decay non-exponentially. This is due to the fact that one has to generate a colored noise and take account of the memory effects in a consistent manner. In this contribution, we present a simple, yet efficient, algorithm for solving the GLE for practical memory kernels and we demonstrate its capability for the exactly solvable case of a harmonic oscillator coupled to a Debye bath.

21 pages, 3 figures

References in corpus (11)

• Canonical sampling through velocity-rescaling
• Energy Dissipation and Transport in Nanoscale Devices
• Thermal Conductivity and Thermal Rectification in Graphene Nanoribbons: a Molecular Dynamics Study
• Accurate sampling using Langevin dynamics
• Nuclear quantum effects in solids using a colored-noise thermostat
• Colored-noise thermostats à la carte
• Accelerating the convergence of path integral dynamics with a generalized Langevin equation
• Current-induced atomic dynamics, instabilities, and Raman signals: Quasi-classical Langevin equation approach
• Efficient multiple time scale molecular dynamics: using colored noise thermostats to stabilize resonances
• Portable implementation of a quantum thermal bath for molecular dynamics simulations
• Optimal Energy Dissipation in Sliding Friction Simulations

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