Studying rare events using forward-flux sampling: Recent breakthroughs and future outlook

Area of Science:

• Computational Chemistry
• Statistical Mechanics
• Biophysics

Background:

• Rare events, driven by unlikely fluctuations, are fundamental to many natural processes, including structural transformations in biology and material science.
• Studying the kinetics and molecular mechanisms of these barrier crossings is essential for predicting and controlling system properties.
• Conventional experimental and computational methods struggle to capture these rare events due to their activated nature.

Purpose of the Study:

• To provide a comprehensive overview of the forward flux sampling (FFS) technique for studying rare events.
• To highlight recent methodological advancements and extensions of FFS.
• To review the diverse applications of FFS in various scientific domains.

Main Methods:

• Focus on the forward flux sampling (FFS) computational technique.
• Overview of FFS methodological variants and extensions.
• Detailed review of FFS applications for studying rare events.

Main Results:

• FFS enables the systematic capture of improbable fluctuations relevant to rare events.
• Recent variants and extensions have broadened the applicability and efficiency of FFS.
• FFS has been successfully applied to a wide array of rare event phenomena.

Conclusions:

• Forward flux sampling is a powerful computational tool for investigating rare events.
• Continued development of FFS promises further insights into complex natural phenomena.
• This perspective maps future research directions for advanced sampling techniques.