Langevin equation with colored noise for constant-temperature molecular dynamics simulations.
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...
| Main Authors: | , , |
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| Format: | Journal article |
| Language: | English |
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2009
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| _version_ | 1797098029049708544 |
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| author | Ceriotti, M Bussi, G Parrinello, M |
| author_facet | Ceriotti, M Bussi, G Parrinello, M |
| author_sort | Ceriotti, M |
| collection | OXFORD |
| description | 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. |
| first_indexed | 2024-03-07T05:03:48Z |
| format | Journal article |
| id | oxford-uuid:d93b2bc0-a713-4bb2-a511-50060183e0a2 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T05:03:48Z |
| publishDate | 2009 |
| record_format | dspace |
| spelling | oxford-uuid:d93b2bc0-a713-4bb2-a511-50060183e0a22022-03-27T08:54:19ZLangevin equation with colored noise for constant-temperature molecular dynamics simulations.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:d93b2bc0-a713-4bb2-a511-50060183e0a2EnglishSymplectic Elements at Oxford2009Ceriotti, MBussi, GParrinello, MWe 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. |
| spellingShingle | Ceriotti, M Bussi, G Parrinello, M Langevin equation with colored noise for constant-temperature molecular dynamics simulations. |
| title | Langevin equation with colored noise for constant-temperature molecular dynamics simulations. |
| title_full | Langevin equation with colored noise for constant-temperature molecular dynamics simulations. |
| title_fullStr | Langevin equation with colored noise for constant-temperature molecular dynamics simulations. |
| title_full_unstemmed | Langevin equation with colored noise for constant-temperature molecular dynamics simulations. |
| title_short | Langevin equation with colored noise for constant-temperature molecular dynamics simulations. |
| title_sort | langevin equation with colored noise for constant temperature molecular dynamics simulations |
| work_keys_str_mv | AT ceriottim langevinequationwithcolorednoiseforconstanttemperaturemoleculardynamicssimulations AT bussig langevinequationwithcolorednoiseforconstanttemperaturemoleculardynamicssimulations AT parrinellom langevinequationwithcolorednoiseforconstanttemperaturemoleculardynamicssimulations |