Langevin equation with colored noise for constant-temperature molecular dynamics simulations.
- Ceriotti M Computational Science, Department of Chemistry and Applied Biosciences, ETH Zürich, USI Campus, Via Giuseppe Buffi 13, CH-6900 Lugano, Switzerland.
- Bussi G
- Parrinello M
- 2009-03-05
Published in:
- Physical review letters. - 2009
English
We discuss the use of a Langevin equation with a colored (correlated) noise to perform constant-temperature molecular dynamics. Since the equations of motion are linear in nature, it is easy to predict the response of a Hamiltonian system to such a thermostat and to tune at will the relaxation time of modes of different frequency. This allows one to optimize the time needed for equilibration and to generate independent configurations. We show how this frequency-dependent response can be exploited to control the temperature of Car-Parrinello-like dynamics without affecting the adiabatic separation of the electronic degrees of freedom from the vibrations of the ions.
- Language
-
- English
- Open access status
- green
- Identifiers
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- DOI 10.1103/PhysRevLett.102.020601
- PMID 19257259
- Persistent URL
- https://sonar.ch/global/documents/71842
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