Phase changes in 38-atom Lennard-Jones clusters. II. A parallel tempering study of equilibrium and dynamic properties in the molecular dynamics and microcanonical ensembles
- 15 June 2000
- journal article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 112 (23), 10350-10357
- https://doi.org/10.1063/1.481672
Abstract
We study the 38-atom Lennard-Jones cluster with parallel tempering Monte Carlo methods in the microcanonical and molecular dynamics ensembles. A new Monte Carlo algorithm is presented that samples rigorously the molecular dynamics ensemble for a system at constant total energy, linear and angular momenta. By combining the parallel tempering technique with molecular dynamics methods, we develop a hybrid method to overcome quasiergodicity and to extract both equilibrium and dynamical properties from Monte Carlo and molecular dynamics simulations. Several thermodynamic, structural, and dynamical properties are investigated for including the caloric curve, the diffusion constant and the largest Lyapunov exponent. The importance of insuring ergodicity in molecular dynamics simulations is illustrated by comparing the results of ergodic simulations with earlier molecular dynamics simulations.
Keywords
This publication has 41 references indexed in Scilit:
- Replica-exchange molecular dynamics method for protein foldingChemical Physics Letters, 1999
- Monte-Carlo simulations of rotating clustersThe European Physical Journal D, 1998
- A j-walking algorithm for microcanonical simulations: Applications to Lennard-Jones clustersThe Journal of Chemical Physics, 1998
- Generalized-ensemble Monte Carlo method for systems with rough energy landscapePhysical Review E, 1997
- Structure, rearrangements and evaporation of rotating atomic clustersMolecular Physics, 1996
- Annealing Markov Chain Monte Carlo with Applications to Ancestral InferenceJournal of the American Statistical Association, 1995
- Extending J walking to quantum systems: Applications to atomic clustersThe Journal of Chemical Physics, 1992
- E J ensemble momentum samplingThe Journal of Chemical Physics, 1991
- Laplace-transform technique for deriving thermodynamic equations from the classical microcanonical ensemblePhysical Review A, 1985
- Kolmogorov entropy and numerical experimentsPhysical Review A, 1976