Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-3154
Guidon, M; Schiffmann, F; Hutter, J; VandeVondele, J (2008). Ab initio molecular dynamics using hybrid density functionals. Journal of Chemical Physics, 128(21):214104.
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Ab initio molecular dynamics simulations with hybrid density functionals have so far found little application due to their computational cost. In this work, an implementation of the Hartree-Fock exchange is presented that is specifically targeted at ab initio molecular dynamics simulations of medium sized systems. We demonstrate that our implementation, which is available as part of the CP2K/Quickstep program, is robust and efficient. Several prescreening techniques lead to a linear scaling cost for integral evaluation and storage. Integral compression techniques allow for in-core calculations on systems containing several thousand basis functions. The massively parallel implementation respects integral symmetry and scales up to hundreds of CPUs using a dynamic load balancing scheme. A time-reversible multiple time step scheme, exploiting the difference in computational efficiency between hybrid and local functionals, brings further time savings. With extensive simulations of liquid water, we demonstrate the ability to perform, for several tens of picoseconds, ab initio molecular dynamics based on hybrid functionals of systems in the condensed phase containing a few thousand Gaussian basis functions.
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|Item Type:||Journal Article, refereed, original work|
|Communities & Collections:||07 Faculty of Science > Department of Chemistry|
|Deposited On:||08 Sep 2008 09:29|
|Last Modified:||05 Jun 2014 13:50|
|Publisher:||American Institute of Physics|
|Funders:||Forschungskredit UZH, Swiss National Science Foundation|
|Additional Information:||Copyright 2008 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Journal of Chemical Physics 2008, 128(21):214104 and may be found at http://link.aip.org/link/?JCPSA6/128/214104/1.|
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