Reaction Pathways Based on the Gradient of the Mean First-Passage Time
  Finding representative reaction pathways is necessary for understanding mechanisms of molecular processes, but is considered to be extremely challenging. We propose a new method to construct reaction paths based on mean first-passage times. This approach incorporates information of all possible reaction events as well as the effect of temperature. The method is applied to exemplary reactions in a continuous and in a discrete setting. The suggested approach holds great promise for large reaction networks that are completely characterized by the method through a pathway graph. 
Sanghyun Park and Klaus Schulten (University of Illinois at   Urbana-Champaign)