Molecular Dynamics using Non-variational Polarizable Force Fields: Theory, Periodic Boundary Conditions Implementation and Application to the Bond Capacity Model

Abstract : We extend the framework for polarizable force fields to include the case where the electrostatic multipoles are not determined by a variational minimization of the electrostatic energy. Such models formally require that the polarization response is calculated for all electrostatic parameters for all possible geometrical perturbations in order to obtain the energy gradient required for performing molecular dynamics simulations. By making use of a Lagrange formalism, however, this computational demanding task can be replaced by solving a single equation similar to that for determining the polarization energy itself. Using the recently proposed bond capacity model that describes molecular polarization at the charge-only level, we show that the energy gradient for non-variational energy models with periodic boundary conditions can be calculated with a computational effort similar to that for variational polarization models. The possibility of separating the equation for calculating the electrostatic parameters from the energy expression depending on these parameters without a large computational penalty provides flexibility in the design of new force fields.
Document type :
Journal articles
Complete list of metadatas

https://hal.archives-ouvertes.fr/hal-02299827
Contributor : Jean-Philip Piquemal <>
Submitted on : Saturday, September 28, 2019 - 2:34:09 PM
Last modification on : Friday, October 4, 2019 - 3:14:21 PM

Identifiers

Citation

Poier Pier Paolo, Louis Lagardère, Jean-Philip Piquemal, Frank Jensen. Molecular Dynamics using Non-variational Polarizable Force Fields: Theory, Periodic Boundary Conditions Implementation and Application to the Bond Capacity Model. Journal of Chemical Theory and Computation, American Chemical Society, 2019, ⟨10.1021/acs.jctc.9b00721⟩. ⟨hal-02299827⟩

Share

Metrics

Record views

23