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The Polarizable point dipoles method with electrostatic damping: implementation on a model system

Sala, Jonàs and Guàrdia, Elvira and Masia, Marco (2010) The Polarizable point dipoles method with electrostatic damping: implementation on a model system. Journal of Chemical Physics, Vol. 133 (23), p. 234101. eISSN 1089-7690. Article.

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DOI: 10.1063/1.3511713

Abstract

Recently, the use of polarizable force fields in Molecular Dynamics simulations has been gaining importance, since they allow a better description of heterogeneous systems compared to simple point charges force fields. Among the various techniques developed in the last years the one based on polarizable point dipoles represents one of the most used. In this paper, we review the basic technical issues of the method, illustrating the way to implement intramolecular and intermolecular damping of the electrostatic interactions, either with and without the Ewald summation method. We also show how to reduce the computational overhead for evaluating the dipoles, introducing to the state–of–the–art methods: the extended Lagrangian method and the always stable predictor corrector method. Finally we discuss the importance of screening the electrostatic interactions at short range, defending this technique against simpler approximations usually made. We compare results of density functional theory and classical force field–based Molecular Dynamics simulations of chloride in water.

Item Type:Article
ID Code:7769
Status:Published
Refereed:Yes
Uncontrolled Keywords:Polarizable point dipoles (ppd) method, electrostatic damping, Molecular Dynamics (MD) simulations
Subjects:Area 03 - Scienze chimiche > CHIM/02 Chimica fisica
Divisions:002 Altri enti e centri di ricerca del Nord Sardegna > CNR-Consiglio Nazionale delle Ricerche
001 Università di Sassari > 01 Dipartimenti > Chimica
Publisher:American Institute of Physics
eISSN:1089-7690
Deposited On:12 Jul 2012 16:05

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