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Assessing Generic Collective Variables for Determining Reaction Rates in Metadynamics Simulations.
Journal of Chemical Theory and Computation 2017 March 15
A persistent challenge in using the metadynamics method is deciding which degrees of freedom, or collective variables, should be biased because these selections are not obvious and require intuition about the system being studied. There are, however, collective variables, which can be constructed with only basic knowledge about the system studied, that provide an opportunity to alleviate this issue. We simulated two different reacting systems where two types of such collective variables (SPRINT coordinates and the collective variable-driven hyperdynamics method) were biased following the infrequent metadynamics method in order to recover the rates of reactions. We demonstrate that both generic collective variables are capable of reproducing the reaction rates of both systems and can enhance the efficiency of the simulation when compared to typical collective variables.
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