Assessing the Reliability of the Dynamics Reconstructed from Metadynamics

Area of Science:

• Computational Chemistry
• Molecular Dynamics Simulations
• Statistical Mechanics

Background:

• Simulating molecular processes with high activation energy (>> kBT) is computationally demanding.
• Previous work showed well-tempered metadynamics can compute transition times if bias is avoided in transition states and collective variables lack hysteresis.

Purpose of the Study:

• To develop reliable methods for calculating transition times in molecular dynamics.
• To address the challenge of ensuring criteria for accurate metadynamics simulations are met.

Main Methods:

• Leveraging the Poisson statistics of escape times from metastable states.
• Developing quantitative measures to assess the trustworthiness of simulation results.

Main Results:

• Demonstrated a method to identify trustworthy transition time calculations.
• Validated the approach on paradigmatic examples.

Conclusions:

• The proposed method provides quantitative measures for the reliability of transition time calculations.
• This approach enhances the accuracy of molecular dynamics simulations for complex processes.