On-the-fly free energy parameterization via temperature accelerated molecular dynamics

Area of Science:

• Computational chemistry
• Statistical mechanics
• Molecular modeling

Background:

• Free energy calculations are crucial for understanding molecular systems.
• Existing methods can be computationally expensive or limited in scope.
• Parametric free energy functions offer a potentially efficient approach.

Purpose of the Study:

• To present a new method for parametric free energy function calculation.
• To enable optimization of these functions in arbitrary collective variables.
• To demonstrate the method's utility in deriving effective potentials.

Main Methods:

• Utilizes a variant of temperature-accelerated molecular dynamics.
• Employs on-the-fly parameter evolution.
• Minimizes a cumulative gradient error for optimization.

Main Results:

• Successfully demonstrated the method's performance on simple systems.
• Showcased the application in deriving effective pairwise potentials.
• Validated the parametric calculation of free energy functions.

Conclusions:

• The presented method offers an efficient approach for free energy calculations.
• It is applicable to arbitrary collective variables.
• Facilitates the development of accurate potentials for multiscale simulations.